166351250145604 has 6 divisors (see below), whose sum is σ = 291114687754814. Its totient is φ = 83175625072800.

The previous prime is 166351250145527. The next prime is 166351250145701. The reversal of 166351250145604 is 406541052153661.

It can be written as a sum of positive squares in only one way, i.e., 104504004198400 + 61847245947204 = 10222720^2 + 7864302^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20793906268197 + ... + 20793906268204.

Almost surely, 2^{166351250145604} is an apocalyptic number.

It is an amenable number.

166351250145604 is a deficient number, since it is larger than the sum of its proper divisors (124763437609210).

166351250145604 is a wasteful number, since it uses less digits than its factorization.

166351250145604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41587812536405 (or 41587812536403 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 49.

The spelling of 166351250145604 in words is "one hundred sixty-six trillion, three hundred fifty-one billion, two hundred fifty million, one hundred forty-five thousand, six hundred four".