166137604 has 6 divisors (see below), whose sum is σ = 290740814. Its totient is φ = 83068800.

The previous prime is 166137593. The next prime is 166137619. The reversal of 166137604 is 406731661.

It can be written as a sum of positive squares in only one way, i.e., 157552704 + 8584900 = 12552^2 + 2930^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 166137604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20767197 + ... + 20767204.

Almost surely, 2^166137604 is an apocalyptic number.

It is an amenable number.

166137604 is a deficient number, since it is larger than the sum of its proper divisors (124603210).

166137604 is a wasteful number, since it uses less digits than its factorization.

166137604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41534405 (or 41534403 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 166137604 is about 12889.4376913813. The cubic root of 166137604 is about 549.7382820927.

The spelling of 166137604 in words is "one hundred sixty-six million, one hundred thirty-seven thousand, six hundred four".