656604677 has 2 divisors, whose sum is σ = 656604678. Its totient is φ = 656604676.

The previous prime is 656604673. The next prime is 656604691. The reversal of 656604677 is 776406656.

656604677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 597606916 + 58997761 = 24446^2 + 7681^2 .

It is a cyclic number.

It is not a de Polignac number, because 656604677 - 2² = 656604673 is a prime.

It is a super-2 number, since 2×656604677² = 862259403716548658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656604673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328302338 + 328302339.

It is an arithmetic number, because the mean of its divisors is an integer number (328302339).

Almost surely, 2^656604677 is an apocalyptic number.

It is an amenable number.

656604677 is a deficient number, since it is larger than the sum of its proper divisors (1).

656604677 is an equidigital number, since it uses as much as digits as its factorization.

656604677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1270080, while the sum is 47.

The square root of 656604677 is about 25624.2985660096. The cubic root of 656604677 is about 869.1631875281.

The spelling of 656604677 in words is "six hundred fifty-six million, six hundred four thousand, six hundred seventy-seven".