656650000 has 120 divisors (see below), whose sum is σ = 1662268608. Its totient is φ = 250800000.

The previous prime is 656649991. The next prime is 656650009. The reversal of 656650000 is 56656.

It is an interprime number because it is at equal distance from previous prime (656649991) and next prime (656650009).

It is not an unprimeable number, because it can be changed into a prime (656650009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1149715 + ... + 1150285.

Almost surely, 2^656650000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656650000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (831134304).

656650000 is an abundant number, since it is smaller than the sum of its proper divisors (1005618608).

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

656650000 is an equidigital number, since it uses as much as digits as its factorization.

656650000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 601 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 656650000 is about 25625.1829261764. The cubic root of 656650000 is about 869.1831854448.

The spelling of 656650000 in words is "six hundred fifty-six million, six hundred fifty thousand".