656989164106603 has 8 divisors (see below), whose sum is σ = 672268409729136. Its totient is φ = 641709937932000.

The previous prime is 656989164106591. The next prime is 656989164106631. The reversal of 656989164106603 is 306601461989656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 656989164106603 - 2³³ = 656980574172011 is a prime.

It is a super-2 number, since 2×656989164106603² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656989164106673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80860053 + ... + 88613353.

It is an arithmetic number, because the mean of its divisors is an integer number (84033551216142).

Almost surely, 2^{656989164106603} is an apocalyptic number.

656989164106603 is a deficient number, since it is larger than the sum of its proper divisors (15279245622533).

656989164106603 is a wasteful number, since it uses less digits than its factorization.

656989164106603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9723965.

The product of its (nonzero) digits is 302330880, while the sum is 70.

The spelling of 656989164106603 in words is "six hundred fifty-six trillion, nine hundred eighty-nine billion, one hundred sixty-four million, one hundred six thousand, six hundred three".