167665657 has 2 divisors, whose sum is σ = 167665658. Its totient is φ = 167665656.

The previous prime is 167665651. The next prime is 167665661. The reversal of 167665657 is 756566761.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158357056 + 9308601 = 12584^2 + 3051^2 .

It is a cyclic number.

It is not a de Polignac number, because 167665657 - 2⁷ = 167665529 is a prime.

It is a super-2 number, since 2×167665657² = 56223545074483298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 167665657.

It is not a weakly prime, because it can be changed into another prime (167665651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83832828 + 83832829.

It is an arithmetic number, because the mean of its divisors is an integer number (83832829).

Almost surely, 2^167665657 is an apocalyptic number.

It is an amenable number.

167665657 is a deficient number, since it is larger than the sum of its proper divisors (1).

167665657 is an equidigital number, since it uses as much as digits as its factorization.

167665657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1587600, while the sum is 49.

The square root of 167665657 is about 12948.5774122102. The cubic root of 167665657 is about 551.4185497278.

The spelling of 167665657 in words is "one hundred sixty-seven million, six hundred sixty-five thousand, six hundred fifty-seven".