166372690 has 16 divisors (see below), whose sum is σ = 326695680. Its totient is φ = 60499120.

The previous prime is 166372669. The next prime is 166372699. The reversal of 166372690 is 96273661.

166372690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166372690² = 55359743955672200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166372699) 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, 756130 + ... + 756349.

It is an arithmetic number, because the mean of its divisors is an integer number (20418480).

Almost surely, 2^166372690 is an apocalyptic number.

166372690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166372690 is a deficient number, since it is larger than the sum of its proper divisors (160322990).

166372690 is a wasteful number, since it uses less digits than its factorization.

166372690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512497.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 166372690 is about 12898.5537949027. The cubic root of 166372690 is about 549.9974545337.

The spelling of 166372690 in words is "one hundred sixty-six million, three hundred seventy-two thousand, six hundred ninety".