66706706264 has 32 divisors (see below), whose sum is σ = 136475539200. Its totient is φ = 30314562720.

The previous prime is 66706706251. The next prime is 66706706299. The reversal of 66706706264 is 46260760766.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330749 + ... + 492755.

It is an arithmetic number, because the mean of its divisors is an integer number (4264860600).

Almost surely, 2^66706706264 is an apocalyptic number.

It is an amenable number.

66706706264 is an abundant number, since it is smaller than the sum of its proper divisors (69768832936).

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

66706706264 is a wasteful number, since it uses less digits than its factorization.

66706706264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166703 (or 166699 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 50.

The spelling of 66706706264 in words is "sixty-six billion, seven hundred six million, seven hundred six thousand, two hundred sixty-four".