166842090 has 24 divisors (see below), whose sum is σ = 433789668. Its totient is φ = 44491200.

The previous prime is 166842089. The next prime is 166842101. The reversal of 166842090 is 90248661.

It can be written as a sum of positive squares in 2 ways, for example, as 166642281 + 199809 = 12909^2 + 447^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 926811 + ... + 926990.

Almost surely, 2^166842090 is an apocalyptic number.

166842090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166842090 is an abundant number, since it is smaller than the sum of its proper divisors (266947578).

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

166842090 is a wasteful number, since it uses less digits than its factorization.

166842090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853814 (or 1853811 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 166842090 is about 12916.7368170138. The cubic root of 166842090 is about 550.5142188093.

The spelling of 166842090 in words is "one hundred sixty-six million, eight hundred forty-two thousand, ninety".