66001166656604 has 12 divisors (see below), whose sum is σ = 115510338710928. Its totient is φ = 32998212739200.

The previous prime is 66001166656589. The next prime is 66001166656643. The reversal of 66001166656604 is 40665666110066.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 592584632 + ... + 592695999.

It is an arithmetic number, because the mean of its divisors is an integer number (9625861559244).

Almost surely, 2^{66001166656604} is an apocalyptic number.

It is an amenable number.

66001166656604 is a deficient number, since it is larger than the sum of its proper divisors (49509172054324).

66001166656604 is a wasteful number, since it uses less digits than its factorization.

66001166656604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185294556 (or 1185294554 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 53.

The spelling of 66001166656604 in words is "sixty-six trillion, one billion, one hundred sixty-six million, six hundred fifty-six thousand, six hundred four".