656313125066 has 4 divisors (see below), whose sum is σ = 984469687602. Its totient is φ = 328156562532.

The previous prime is 656313125063. The next prime is 656313125131. The reversal of 656313125066 is 660521313656.

656313125066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 540188250625 + 116124874441 = 734975^2 + 340771^2 .

It is not an unprimeable number, because it can be changed into a prime (656313125063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164078281265 + ... + 164078281268.

Almost surely, 2^656313125066 is an apocalyptic number.

656313125066 is a deficient number, since it is larger than the sum of its proper divisors (328156562536).

656313125066 is a wasteful number, since it uses less digits than its factorization.

656313125066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328156562535.

The product of its (nonzero) digits is 583200, while the sum is 44.

The spelling of 656313125066 in words is "six hundred fifty-six billion, three hundred thirteen million, one hundred twenty-five thousand, sixty-six".