56651066620 has 24 divisors (see below), whose sum is σ = 119002777488. Its totient is φ = 22653657600.

The previous prime is 56651066617. The next prime is 56651066627. The reversal of 56651066620 is 2666015665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56651066627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354166 + ... + 488605.

It is an arithmetic number, because the mean of its divisors is an integer number (4958449062).

Almost surely, 2^56651066620 is an apocalyptic number.

It is an amenable number.

56651066620 is an abundant number, since it is smaller than the sum of its proper divisors (62351710868).

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

56651066620 is a wasteful number, since it uses less digits than its factorization.

56651066620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846141 (or 846139 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 56651066620 in words is "fifty-six billion, six hundred fifty-one million, sixty-six thousand, six hundred twenty".