20660622624 has 36 divisors (see below), whose sum is σ = 58753646406. Its totient is φ = 6886874112.

The previous prime is 20660622623. The next prime is 20660622641. The reversal of 20660622624 is 42622606602.

It is a happy number.

20660622624 is a `hidden beast` number, since 2 + 0 + 6 + 6 + 0 + 6 + 22 + 624 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17218688400 + 3441934224 = 131220^2 + 58668^2 .

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

It is a super-2 number, since 2×20660622624² (a number of 21 digits) contains 22 as substring.

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 (20660622623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35868849 + ... + 35869424.

Almost surely, 2^20660622624 is an apocalyptic number.

20660622624 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20660622624 is an abundant number, since it is smaller than the sum of its proper divisors (38093023782).

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

20660622624 is a wasteful number, since it uses less digits than its factorization.

20660622624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71738289 (or 71738278 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 20660622624 in words is "twenty billion, six hundred sixty million, six hundred twenty-two thousand, six hundred twenty-four".