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66410065 = 5671371447
BaseRepresentation
bin1111110101010…
…1011001010001
311121221222111001
43331111121101
5114000110230
610331222001
71434322231
oct375253121
9147858431
1066410065
1134539957
121a2a7901
13109b27c7
148b69cc1
155c6c0ca
hex3f55651

66410065 has 16 divisors (see below), whose sum is σ = 81528192. Its totient is φ = 51917184.

The previous prime is 66410059. The next prime is 66410093. The reversal of 66410065 is 56001466.

It is a cyclic number.

It is not a de Polignac number, because 66410065 - 213 = 66401873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45172 + ... + 46618.

It is an arithmetic number, because the mean of its divisors is an integer number (5095512).

Almost surely, 266410065 is an apocalyptic number.

It is an amenable number.

66410065 is a deficient number, since it is larger than the sum of its proper divisors (15118127).

66410065 is a wasteful number, since it uses less digits than its factorization.

66410065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 66410065 is about 8149.2370808561. The cubic root of 66410065 is about 404.9592297525.

The spelling of 66410065 in words is "sixty-six million, four hundred ten thousand, sixty-five".

Divisors: 1 5 67 137 335 685 1447 7235 9179 45895 96949 198239 484745 991195 13282013 66410065