66616165066 has 32 divisors (see below), whose sum is σ = 110579043456. Its totient is φ = 29844024000.

The previous prime is 66616165051. The next prime is 66616165073. The reversal of 66616165066 is 66056161666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7513476 + ... + 7522336.

It is an arithmetic number, because the mean of its divisors is an integer number (3455595108).

Almost surely, 2^66616165066 is an apocalyptic number.

66616165066 is a deficient number, since it is larger than the sum of its proper divisors (43962878390).

66616165066 is a wasteful number, since it uses less digits than its factorization.

66616165066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13758.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 66616165066 in words is "sixty-six billion, six hundred sixteen million, one hundred sixty-five thousand, sixty-six".