166606051666604 has 12 divisors (see below), whose sum is σ = 318066098636328. Its totient is φ = 75730023484800.

The previous prime is 166606051666603. The next prime is 166606051666723. The reversal of 166606051666604 is 406666150606661.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (166606051666603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1893250587077 + ... + 1893250587164.

It is an arithmetic number, because the mean of its divisors is an integer number (26505508219694).

Almost surely, 2^{166606051666604} is an apocalyptic number.

It is an amenable number.

166606051666604 is a deficient number, since it is larger than the sum of its proper divisors (151460046969724).

166606051666604 is a wasteful number, since it uses less digits than its factorization.

166606051666604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3786501174256 (or 3786501174254 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 59.

The spelling of 166606051666604 in words is "one hundred sixty-six trillion, six hundred six billion, fifty-one million, six hundred sixty-six thousand, six hundred four".