66564436410 has 48 divisors (see below), whose sum is σ = 182176356960. Its totient is φ = 16816278240.

The previous prime is 66564436369. The next prime is 66564436423. The reversal of 66564436410 is 1463446566.

66564436410 is a `hidden beast` number, since 6 + 6 + 564 + 43 + 6 + 41 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 23 ways as a sum of consecutive naturals, for example, 19461576 + ... + 19464995.

It is an arithmetic number, because the mean of its divisors is an integer number (3795340770).

Almost surely, 2^66564436410 is an apocalyptic number.

66564436410 is an abundant number, since it is smaller than the sum of its proper divisors (115611920550).

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

66564436410 is a wasteful number, since it uses less digits than its factorization.

66564436410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38926603 (or 38926600 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 66564436410 in words is "sixty-six billion, five hundred sixty-four million, four hundred thirty-six thousand, four hundred ten".