166331151 has 40 divisors (see below), whose sum is σ = 293156864. Its totient is φ = 91970640.

The previous prime is 166331117. The next prime is 166331159. The reversal of 166331151 is 151133661.

166331151 is a `hidden beast` number, since 16 + 633 + 1 + 15 + 1 = 666.

It is not a de Polignac number, because 166331151 - 2¹⁴ = 166314767 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166331159) by changing a digit.

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 in 39 ways as a sum of consecutive naturals, for example, 12846 + ... + 22308.

Almost surely, 2^166331151 is an apocalyptic number.

166331151 is a deficient number, since it is larger than the sum of its proper divisors (126825713).

166331151 is an equidigital number, since it uses as much as digits as its factorization.

166331151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9513 (or 9504 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 166331151 is about 12896.9434751029. The cubic root of 166331151 is about 549.9516772972.

The spelling of 166331151 in words is "one hundred sixty-six million, three hundred thirty-one thousand, one hundred fifty-one".