166642790 has 16 divisors (see below), whose sum is σ = 300120768. Its totient is φ = 66620736.

The previous prime is 166642757. The next prime is 166642807. The reversal of 166642790 is 97246661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22154 + ... + 28706.

It is an arithmetic number, because the mean of its divisors is an integer number (18757548).

Almost surely, 2^166642790 is an apocalyptic number.

166642790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166642790 is a deficient number, since it is larger than the sum of its proper divisors (133477978).

166642790 is a wasteful number, since it uses less digits than its factorization.

166642790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9103.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 166642790 is about 12909.0197149125. The cubic root of 166642790 is about 550.2949272220.

The spelling of 166642790 in words is "one hundred sixty-six million, six hundred forty-two thousand, seven hundred ninety".