662657 has 2 divisors, whose sum is σ = 662658. Its totient is φ = 662656.

The previous prime is 662647. The next prime is 662671. The reversal of 662657 is 756266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 583696 + 78961 = 764^2 + 281^2 .

It is a cyclic number.

It is not a de Polignac number, because 662657 - 2⁸ = 662401 is a prime.

It is a super-2 number, since 2×662657² = 878228599298, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (662617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331328 + 331329.

It is an arithmetic number, because the mean of its divisors is an integer number (331329).

2⁶⁶²⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

662657 is a deficient number, since it is larger than the sum of its proper divisors (1).

662657 is an equidigital number, since it uses as much as digits as its factorization.

662657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 662657 is about 814.0374684251. The cubic root of 662657 is about 87.1825558490.

The spelling of 662657 in words is "six hundred sixty-two thousand, six hundred fifty-seven".