656641260 has 144 divisors (see below), whose sum is σ = 2267516160. Its totient is φ = 152254080.

The previous prime is 656641253. The next prime is 656641289. The reversal of 656641260 is 62146656.

It is a happy number.

656641260 is a `hidden beast` number, since 6 + 5 + 6 + 641 + 2 + 6 + 0 = 666.

656641260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38331 + ... + 52749.

It is an arithmetic number, because the mean of its divisors is an integer number (15746640).

Almost surely, 2^656641260 is an apocalyptic number.

656641260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656641260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1133758080).

656641260 is an abundant number, since it is smaller than the sum of its proper divisors (1610874900).

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

656641260 is a wasteful number, since it uses less digits than its factorization.

656641260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14468 (or 14463 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 656641260 is about 25625.0123902409. The cubic root of 656641260 is about 869.1793291567.

The spelling of 656641260 in words is "six hundred fifty-six million, six hundred forty-one thousand, two hundred sixty".