667160657 has 2 divisors, whose sum is σ = 667160658. Its totient is φ = 667160656.

The previous prime is 667160633. The next prime is 667160687. The reversal of 667160657 is 756061766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 632220736 + 34939921 = 25144^2 + 5911^2 .

It is a cyclic number.

It is not a de Polignac number, because 667160657 - 2⁸ = 667160401 is a prime.

It is not a weakly prime, because it can be changed into another prime (667160687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333580328 + 333580329.

It is an arithmetic number, because the mean of its divisors is an integer number (333580329).

Almost surely, 2^667160657 is an apocalyptic number.

It is an amenable number.

667160657 is a deficient number, since it is larger than the sum of its proper divisors (1).

667160657 is an equidigital number, since it uses as much as digits as its factorization.

667160657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 667160657 is about 25829.4532849613. The cubic root of 667160657 is about 873.7961816165.

The spelling of 667160657 in words is "six hundred sixty-seven million, one hundred sixty thousand, six hundred fifty-seven".