656160161 has 4 divisors (see below), whose sum is σ = 662530752. Its totient is φ = 649789572.

The previous prime is 656160157. The next prime is 656160199. The reversal of 656160161 is 161061656.

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 656160161 - 2² = 656160157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656165161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3185141 + ... + 3185346.

It is an arithmetic number, because the mean of its divisors is an integer number (165632688).

Almost surely, 2^656160161 is an apocalyptic number.

It is an amenable number.

656160161 is a deficient number, since it is larger than the sum of its proper divisors (6370591).

656160161 is a wasteful number, since it uses less digits than its factorization.

656160161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6370590.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 656160161 is about 25615.6233771501. The cubic root of 656160161 is about 868.9670044586.

The spelling of 656160161 in words is "six hundred fifty-six million, one hundred sixty thousand, one hundred sixty-one".