166791951 has 24 divisors (see below), whose sum is σ = 244351536. Its totient is φ = 109624320.

The previous prime is 166791931. The next prime is 166791959. The reversal of 166791951 is 159197661.

166791951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166791951 - 2⁶ = 166791887 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166791897 and 166791906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166791959) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227181 + ... + 227913.

It is an arithmetic number, because the mean of its divisors is an integer number (10181314).

Almost surely, 2^166791951 is an apocalyptic number.

166791951 is a deficient number, since it is larger than the sum of its proper divisors (77559585).

166791951 is a wasteful number, since it uses less digits than its factorization.

166791951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063 (or 1060 counting only the distinct ones).

The product of its digits is 102060, while the sum is 45.

The square root of 166791951 is about 12914.7958172013. The cubic root of 166791951 is about 550.4590668632.

The spelling of 166791951 in words is "one hundred sixty-six million, seven hundred ninety-one thousand, nine hundred fifty-one".