656729870 has 16 divisors (see below), whose sum is σ = 1244330640. Its totient is φ = 248865984.

The previous prime is 656729861. The next prime is 656729881. The reversal of 656729870 is 78927656.

656729870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

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, 1728047 + ... + 1728426.

It is an arithmetic number, because the mean of its divisors is an integer number (77770665).

Almost surely, 2^656729870 is an apocalyptic number.

656729870 is a deficient number, since it is larger than the sum of its proper divisors (587600770).

656729870 is a wasteful number, since it uses less digits than its factorization.

656729870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456499.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The square root of 656729870 is about 25626.7413066898. The cubic root of 656729870 is about 869.2184243323.

The spelling of 656729870 in words is "six hundred fifty-six million, seven hundred twenty-nine thousand, eight hundred seventy".