166235990 has 16 divisors (see below), whose sum is σ = 299371680. Its totient is φ = 66461760.

The previous prime is 166235977. The next prime is 166236071. The reversal of 166235990 is 99532661.

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, 37175 + ... + 41405.

It is an arithmetic number, because the mean of its divisors is an integer number (18710730).

Almost surely, 2^166235990 is an apocalyptic number.

166235990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166235990 is a deficient number, since it is larger than the sum of its proper divisors (133135690).

166235990 is a wasteful number, since it uses less digits than its factorization.

166235990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8167.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 166235990 is about 12893.2536622840. The cubic root of 166235990 is about 549.8467782553.

The spelling of 166235990 in words is "one hundred sixty-six million, two hundred thirty-five thousand, nine hundred ninety".