66667400066 has 16 divisors (see below), whose sum is σ = 100808494080. Its totient is φ = 33064673040.

The previous prime is 66667400011. The next prime is 66667400071. The reversal of 66667400066 is 66000476666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1414196 + ... + 1460576.

It is an arithmetic number, because the mean of its divisors is an integer number (6300530880).

Almost surely, 2^66667400066 is an apocalyptic number.

66667400066 is a deficient number, since it is larger than the sum of its proper divisors (34141094014).

66667400066 is a wasteful number, since it uses less digits than its factorization.

66667400066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52169.

The product of its (nonzero) digits is 1306368, while the sum is 47.

The spelling of 66667400066 in words is "sixty-six billion, six hundred sixty-seven million, four hundred thousand, sixty-six".