12566332620 has 36 divisors (see below), whose sum is σ = 38117876160. Its totient is φ = 3351021984.

The previous prime is 12566332589. The next prime is 12566332621. The reversal of 12566332620 is 2623366521.

12566332620 is a `hidden beast` number, since 1 + 2 + 566 + 3 + 32 + 62 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (12566332621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34906300 + ... + 34906659.

Almost surely, 2^12566332620 is an apocalyptic number.

12566332620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12566332620 is an abundant number, since it is smaller than the sum of its proper divisors (25551543540).

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

12566332620 is a wasteful number, since it uses less digits than its factorization.

12566332620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69812974 (or 69812969 counting only the distinct ones).

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

The spelling of 12566332620 in words is "twelve billion, five hundred sixty-six million, three hundred thirty-two thousand, six hundred twenty".