656555670 has 48 divisors (see below), whose sum is σ = 1726246080. Its totient is φ = 173112192.

The previous prime is 656555663. The next prime is 656555689. The reversal of 656555670 is 76555656.

656555670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32974 + ... + 48993.

It is an arithmetic number, because the mean of its divisors is an integer number (35963460).

Almost surely, 2^656555670 is an apocalyptic number.

656555670 is an abundant number, since it is smaller than the sum of its proper divisors (1069690410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

656555670 is a wasteful number, since it uses less digits than its factorization.

656555670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82069 (or 82066 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 45.

The square root of 656555670 is about 25623.3422878437. The cubic root of 656555670 is about 869.1415630806.

The spelling of 656555670 in words is "six hundred fifty-six million, five hundred fifty-five thousand, six hundred seventy".