12664620 has 96 divisors (see below), whose sum is σ = 40320000. Its totient is φ = 3298752.

The previous prime is 12664607. The next prime is 12664669. The reversal of 12664620 is 2646621.

It is a happy number.

12664620 is a `hidden beast` number, since 12 + 6 + 646 + 2 + 0 = 666.

12664620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 25131 + ... + 25629.

It is an arithmetic number, because the mean of its divisors is an integer number (420000).

Almost surely, 2^12664620 is an apocalyptic number.

12664620 is a gapful number since it is divisible by the number (10) 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 12664620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20160000).

12664620 is an abundant number, since it is smaller than the sum of its proper divisors (27655380).

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

12664620 is a wasteful number, since it uses less digits than its factorization.

12664620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 12664620 is about 3558.7385405506. The cubic root of 12664620 is about 233.0937995366.

It can be divided in two parts, 1266 and 4620, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 12664620 in words is "twelve million, six hundred sixty-four thousand, six hundred twenty".