656120675764 has 6 divisors (see below), whose sum is σ = 1148211182594. Its totient is φ = 328060337880.

The previous prime is 656120675731. The next prime is 656120675767. The reversal of 656120675764 is 467576021656.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 599243195664 + 56877480100 = 774108^2 + 238490^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656120675767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82015084467 + ... + 82015084474.

Almost surely, 2^656120675764 is an apocalyptic number.

It is an amenable number.

656120675764 is a deficient number, since it is larger than the sum of its proper divisors (492090506830).

656120675764 is a wasteful number, since it uses less digits than its factorization.

656120675764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164030168945 (or 164030168943 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 656120675764 in words is "six hundred fifty-six billion, one hundred twenty million, six hundred seventy-five thousand, seven hundred sixty-four".