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66908341 = 71942371
BaseRepresentation
bin1111111100111…
…1000010110101
311122220021222201
43333033002311
5114112031331
610350024501
71441466023
oct377170265
9148807881
1066908341
113484a255
121a4a8131
1310b28546
148c59713
155d19a61
hex3fcf0b5

66908341 has 4 divisors (see below), whose sum is σ = 67850784. Its totient is φ = 65965900.

The previous prime is 66908287. The next prime is 66908363. The reversal of 66908341 is 14380966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66908341 - 213 = 66900149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66908341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66908041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471115 + ... + 471256.

It is an arithmetic number, because the mean of its divisors is an integer number (16962696).

Almost surely, 266908341 is an apocalyptic number.

It is an amenable number.

66908341 is a deficient number, since it is larger than the sum of its proper divisors (942443).

66908341 is an equidigital number, since it uses as much as digits as its factorization.

66908341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942442.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 66908341 is about 8179.7518911028. The cubic root of 66908341 is about 405.9695128652.

It can be divided in two parts, 669083 and 41, that added together give a square (669124 = 8182).

The spelling of 66908341 in words is "sixty-six million, nine hundred eight thousand, three hundred forty-one".

Divisors: 1 71 942371 66908341