66564866 has 8 divisors (see below), whose sum is σ = 105102480. Its totient is φ = 31530708.

The previous prime is 66564851. The next prime is 66564871. The reversal of 66564866 is 66846566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66564866.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875816 + ... + 875891.

It is an arithmetic number, because the mean of its divisors is an integer number (13137810).

Almost surely, 2^66564866 is an apocalyptic number.

66564866 is a deficient number, since it is larger than the sum of its proper divisors (38537614).

66564866 is a wasteful number, since it uses less digits than its factorization.

66564866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751728.

The product of its digits is 1244160, while the sum is 47.

The square root of 66564866 is about 8158.7294353962. The cubic root of 66564866 is about 405.2736371561.

The spelling of 66564866 in words is "sixty-six million, five hundred sixty-four thousand, eight hundred sixty-six".