166850016651 has 12 divisors (see below), whose sum is σ = 241363694728. Its totient is φ = 111068060544.

The previous prime is 166850016647. The next prime is 166850016653. The reversal of 166850016651 is 156610058661.

166850016651 is a `hidden beast` number, since 16 + 68 + 500 + 16 + 65 + 1 = 666.

It is not a de Polignac number, because 166850016651 - 2² = 166850016647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166850016597 and 166850016606.

It is not an unprimeable number, because it can be changed into a prime (166850016653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13767265 + ... + 13779378.

Almost surely, 2^166850016651 is an apocalyptic number.

166850016651 is a deficient number, since it is larger than the sum of its proper divisors (74513678077).

166850016651 is a wasteful number, since it uses less digits than its factorization.

166850016651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27547322 (or 27547319 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 166850016651 in words is "one hundred sixty-six billion, eight hundred fifty million, sixteen thousand, six hundred fifty-one".