656666122 has 16 divisors (see below), whose sum is σ = 1129904640. Its totient is φ = 280380528.

The previous prime is 656666099. The next prime is 656666137. The reversal of 656666122 is 221666656.

656666122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83418 + ... + 90949.

It is an arithmetic number, because the mean of its divisors is an integer number (70619040).

Almost surely, 2^656666122 is an apocalyptic number.

656666122 is a deficient number, since it is larger than the sum of its proper divisors (473238518).

656666122 is a wasteful number, since it uses less digits than its factorization.

656666122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174645.

The product of its digits is 155520, while the sum is 40.

The square root of 656666122 is about 25625.4974976097. The cubic root of 656666122 is about 869.1902987505.

The spelling of 656666122 in words is "six hundred fifty-six million, six hundred sixty-six thousand, one hundred twenty-two".