66552225566 has 64 divisors (see below), whose sum is σ = 115166085120. Its totient is φ = 28634964480.

The previous prime is 66552225527. The next prime is 66552225577.

66552225566 is nontrivially palindromic in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7665620 + ... + 7674296.

It is an arithmetic number, because the mean of its divisors is an integer number (1799470080).

Almost surely, 2^66552225566 is an apocalyptic number.

66552225566 is a deficient number, since it is larger than the sum of its proper divisors (48613859554).

66552225566 is a wasteful number, since it uses less digits than its factorization.

66552225566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9129.

The product of its digits is 6480000, while the sum is 50.

The spelling of 66552225566 in words is "sixty-six billion, five hundred fifty-two million, two hundred twenty-five thousand, five hundred sixty-six".