668160931 has 2 divisors, whose sum is σ = 668160932. Its totient is φ = 668160930.

The previous prime is 668160901. The next prime is 668160937. The reversal of 668160931 is 139061866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668160931 - 2⁷ = 668160803 is a prime.

It is a super-2 number, since 2×668160931² = 892878059429573522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (668160937) 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 as a sum of consecutive naturals, namely, 334080465 + 334080466.

It is an arithmetic number, because the mean of its divisors is an integer number (334080466).

Almost surely, 2^668160931 is an apocalyptic number.

668160931 is a deficient number, since it is larger than the sum of its proper divisors (1).

668160931 is an equidigital number, since it uses as much as digits as its factorization.

668160931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 668160931 is about 25848.8090828185. The cubic root of 668160931 is about 874.2326577697.

The spelling of 668160931 in words is "six hundred sixty-eight million, one hundred sixty thousand, nine hundred thirty-one".