166132665 has 24 divisors (see below), whose sum is σ = 288325440. Its totient is φ = 88492704.

The previous prime is 166132643. The next prime is 166132667. The reversal of 166132665 is 566231661.

166132665 is a `hidden beast` number, since 16 + 613 + 26 + 6 + 5 = 666.

It is not a de Polignac number, because 166132665 - 2⁶ = 166132601 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (166132667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44044 + ... + 47666.

It is an arithmetic number, because the mean of its divisors is an integer number (12013560).

Almost surely, 2^166132665 is an apocalyptic number.

166132665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166132665 is a deficient number, since it is larger than the sum of its proper divisors (122192775).

166132665 is a wasteful number, since it uses less digits than its factorization.

166132665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4653 (or 4650 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 166132665 is about 12889.2460989772. The cubic root of 166132665 is about 549.7328344312.

The spelling of 166132665 in words is "one hundred sixty-six million, one hundred thirty-two thousand, six hundred sixty-five".