166494715 has 4 divisors (see below), whose sum is σ = 199793664. Its totient is φ = 133195768.

The previous prime is 166494689. The next prime is 166494721. The reversal of 166494715 is 517494661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166494715 - 2⁵ = 166494683 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16649467 + ... + 16649476.

It is an arithmetic number, because the mean of its divisors is an integer number (49948416).

Almost surely, 2^166494715 is an apocalyptic number.

166494715 is a deficient number, since it is larger than the sum of its proper divisors (33298949).

166494715 is an equidigital number, since it uses as much as digits as its factorization.

166494715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33298948.

The product of its digits is 181440, while the sum is 43.

The square root of 166494715 is about 12903.2831093486. The cubic root of 166494715 is about 550.1318857277.

The spelling of 166494715 in words is "one hundred sixty-six million, four hundred ninety-four thousand, seven hundred fifteen".