166349690 has 32 divisors (see below), whose sum is σ = 325503360. Its totient is φ = 60842304.

The previous prime is 166349681. The next prime is 166349719. The reversal of 166349690 is 96943661.

It is a super-2 number, since 2×166349690² = 55344438726192200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7931 + ... + 19889.

It is an arithmetic number, because the mean of its divisors is an integer number (10171980).

Almost surely, 2^166349690 is an apocalyptic number.

166349690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166349690 is a deficient number, since it is larger than the sum of its proper divisors (159153670).

166349690 is a wasteful number, since it uses less digits than its factorization.

166349690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12086.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 166349690 is about 12897.6621912655. The cubic root of 166349690 is about 549.9721087785.

The spelling of 166349690 in words is "one hundred sixty-six million, three hundred forty-nine thousand, six hundred ninety".