30664656 has 140 divisors (see below), whose sum is σ = 97583040. Its totient is φ = 9253440.

The previous prime is 30664637. The next prime is 30664657. The reversal of 30664656 is 65646603.

30664656 is a `hidden beast` number, since 3 + 0 + 6 + 646 + 5 + 6 = 666.

It is a super-2 number, since 2×30664656² = 1880642255196672, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 30664656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30664657) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 128185 + ... + 128423.

Almost surely, 2^30664656 is an apocalyptic number.

30664656 is a gapful number since it is divisible by the number (36) 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 30664656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48791520).

30664656 is an abundant number, since it is smaller than the sum of its proper divisors (66918384).

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

30664656 is a wasteful number, since it uses less digits than its factorization.

30664656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 255 counting only the distinct ones).

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

The square root of 30664656 is about 5537.5676971031. The cubic root of 30664656 is about 313.0012214701.

The spelling of 30664656 in words is "thirty million, six hundred sixty-four thousand, six hundred fifty-six".