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105666155501 = 224201471301
BaseRepresentation
bin110001001101000110…
…0011001001111101101
3101002202001111212100212
41202122030121033231
53212401013434001
6120313052232205
710430335334204
oct1423214311755
9332661455325
10105666155501
11408a3876645
121858b46b665
139c6c68a88a
1451857aa23b
152b368ca7bb
hex189a3193ed

105666155501 has 4 divisors (see below), whose sum is σ = 105666851004. Its totient is φ = 105665460000.

The previous prime is 105666155489. The next prime is 105666155603. The reversal of 105666155501 is 105551666501.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8759088100 + 96907067401 = 93590^2 + 311299^2 .

It is a cyclic number.

It is not a de Polignac number, because 105666155501 - 26 = 105666155437 is a prime.

It is a super-2 number, since 2×1056661555012 (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105666155201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11450 + ... + 459851.

It is an arithmetic number, because the mean of its divisors is an integer number (26416712751).

Almost surely, 2105666155501 is an apocalyptic number.

It is an amenable number.

105666155501 is a deficient number, since it is larger than the sum of its proper divisors (695503).

105666155501 is an equidigital number, since it uses as much as digits as its factorization.

105666155501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695502.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 105666155501 in words is "one hundred five billion, six hundred sixty-six million, one hundred fifty-five thousand, five hundred one".

Divisors: 1 224201 471301 105666155501