166618790 has 48 divisors (see below), whose sum is σ = 341917200. Its totient is φ = 58271616.

The previous prime is 166618789. The next prime is 166618799. The reversal of 166618790 is 97816661.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166618799) 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, 29516 + ... + 34704.

It is an arithmetic number, because the mean of its divisors is an integer number (7123275).

Almost surely, 2^166618790 is an apocalyptic number.

166618790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166618790 is an abundant number, since it is smaller than the sum of its proper divisors (175298410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166618790 is a wasteful number, since it uses less digits than its factorization.

166618790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5241 (or 5228 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 166618790 is about 12908.0900988489. The cubic root of 166618790 is about 550.2685080125.

The spelling of 166618790 in words is "one hundred sixty-six million, six hundred eighteen thousand, seven hundred ninety".