656606460 has 96 divisors (see below), whose sum is σ = 1869783552. Its totient is φ = 172143360.

The previous prime is 656606417. The next prime is 656606471. The reversal of 656606460 is 64606656.

It is a super-2 number, since 2×656606460² = 862264086627463200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1118287 + ... + 1118873.

It is an arithmetic number, because the mean of its divisors is an integer number (19476912).

Almost surely, 2^656606460 is an apocalyptic number.

656606460 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 656606460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (934891776).

656606460 is an abundant number, since it is smaller than the sum of its proper divisors (1213177092).

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

656606460 is a wasteful number, since it uses less digits than its factorization.

656606460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 656606460 is about 25624.3333571822. Note that the first 4 decimals coincide. The cubic root of 656606460 is about 869.1639742606.

The spelling of 656606460 in words is "six hundred fifty-six million, six hundred six thousand, four hundred sixty".