56664084820 has 96 divisors (see below), whose sum is σ = 145966399488. Its totient is φ = 18034348032.

The previous prime is 56664084797. The next prime is 56664084821. The reversal of 56664084820 is 2848046665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56664084821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10669 + ... + 336811.

It is an arithmetic number, because the mean of its divisors is an integer number (1520483328).

Almost surely, 2^56664084820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56664084820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72983199744).

56664084820 is an abundant number, since it is smaller than the sum of its proper divisors (89302314668).

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

56664084820 is a wasteful number, since it uses less digits than its factorization.

56664084820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326249 (or 326247 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 49.

The spelling of 56664084820 in words is "fifty-six billion, six hundred sixty-four million, eighty-four thousand, eight hundred twenty".