656718068 has 6 divisors (see below), whose sum is σ = 1149256626. Its totient is φ = 328359032.

The previous prime is 656718061. The next prime is 656718077. The reversal of 656718068 is 860817656.

656718068 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 600348004 + 56370064 = 24502^2 + 7508^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656718061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82089755 + ... + 82089762.

It is an arithmetic number, because the mean of its divisors is an integer number (191542771).

Almost surely, 2^656718068 is an apocalyptic number.

It is an amenable number.

656718068 is a deficient number, since it is larger than the sum of its proper divisors (492538558).

656718068 is a wasteful number, since it uses less digits than its factorization.

656718068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164179521 (or 164179519 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 656718068 is about 25626.5110383759. The cubic root of 656718068 is about 869.2132174339.

The spelling of 656718068 in words is "six hundred fifty-six million, seven hundred eighteen thousand, sixty-eight".