656967813 has 16 divisors (see below), whose sum is σ = 883975680. Its totient is φ = 433986416.

The previous prime is 656967811. The next prime is 656967851. The reversal of 656967813 is 318769656.

It is a cyclic number.

It is not a de Polignac number, because 656967813 - 2¹ = 656967811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656967811) 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 in 15 ways as a sum of consecutive naturals, for example, 171958 + ... + 175736.

It is an arithmetic number, because the mean of its divisors is an integer number (55248480).

Almost surely, 2^656967813 is an apocalyptic number.

It is an amenable number.

656967813 is a deficient number, since it is larger than the sum of its proper divisors (227007867).

656967813 is a wasteful number, since it uses less digits than its factorization.

656967813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4296.

The product of its digits is 1632960, while the sum is 51.

The square root of 656967813 is about 25631.3833610283. The cubic root of 656967813 is about 869.3233885779.

The spelling of 656967813 in words is "six hundred fifty-six million, nine hundred sixty-seven thousand, eight hundred thirteen".