656646030 has 96 divisors (see below), whose sum is σ = 1810268928. Its totient is φ = 164851200.

The previous prime is 656645981. The next prime is 656646031. The reversal of 656646030 is 30646656.

656646030 is a `hidden beast` number, since 6 + 5 + 6 + 646 + 0 + 3 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656646031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 100050 + ... + 106410.

It is an arithmetic number, because the mean of its divisors is an integer number (18856968).

Almost surely, 2^656646030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656646030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (905134464).

656646030 is an abundant number, since it is smaller than the sum of its proper divisors (1153622898).

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

656646030 is a wasteful number, since it uses less digits than its factorization.

656646030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6442 (or 6439 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 656646030 is about 25625.1054631976. The cubic root of 656646030 is about 869.1814337941.

The spelling of 656646030 in words is "six hundred fifty-six million, six hundred forty-six thousand, thirty".