166464137 has 8 divisors (see below), whose sum is σ = 194669376. Its totient is φ = 139365072.

The previous prime is 166464131. The next prime is 166464143. The reversal of 166464137 is 731464661.

It is an interprime number because it is at equal distance from previous prime (166464131) and next prime (166464143).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166464137 - 2¹⁸ = 166201993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166464137.

It is not an unprimeable number, because it can be changed into a prime (166464131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276218 + ... + 276819.

It is an arithmetic number, because the mean of its divisors is an integer number (24333672).

Almost surely, 2^166464137 is an apocalyptic number.

It is an amenable number.

166464137 is a deficient number, since it is larger than the sum of its proper divisors (28205239).

166464137 is an equidigital number, since it uses as much as digits as its factorization.

166464137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553087.

The product of its digits is 72576, while the sum is 38.

The square root of 166464137 is about 12902.0981627021. The cubic root of 166464137 is about 550.0982050535.

The spelling of 166464137 in words is "one hundred sixty-six million, four hundred sixty-four thousand, one hundred thirty-seven".