402020056566 has 12 divisors (see below), whose sum is σ = 871043455932. Its totient is φ = 134006685516.

The previous prime is 402020056547. The next prime is 402020056583. The reversal of 402020056566 is 665650020204.

402020056566 is a `hidden beast` number, since 4 + 0 + 20 + 20 + 0 + 56 + 566 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 402020056566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11167223776 + ... + 11167223811.

It is an arithmetic number, because the mean of its divisors is an integer number (72586954661).

Almost surely, 2^402020056566 is an apocalyptic number.

402020056566 is an abundant number, since it is smaller than the sum of its proper divisors (469023399366).

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

402020056566 is a wasteful number, since it uses less digits than its factorization.

402020056566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22334447595 (or 22334447592 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 402020056566 in words is "four hundred two billion, twenty million, fifty-six thousand, five hundred sixty-six".