6566844402 has 24 divisors (see below), whose sum is σ = 14846779584. Its totient is φ = 2093776344.

The previous prime is 6566844343. The next prime is 6566844443. The reversal of 6566844402 is 2044486656.

6566844402 is a `hidden beast` number, since 6 + 566 + 8 + 44 + 40 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7930558 + ... + 7931385.

It is an arithmetic number, because the mean of its divisors is an integer number (618615816).

Almost surely, 2^6566844402 is an apocalyptic number.

6566844402 is an abundant number, since it is smaller than the sum of its proper divisors (8279935182).

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

6566844402 is a wasteful number, since it uses less digits than its factorization.

6566844402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15861974 (or 15861971 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The square root of 6566844402 is about 81036.0685250710. The cubic root of 6566844402 is about 1872.6311443659.

The spelling of 6566844402 in words is "six billion, five hundred sixty-six million, eight hundred forty-four thousand, four hundred two".