166210990 has 32 divisors (see below), whose sum is σ = 328600800. Its totient is φ = 60028800.

The previous prime is 166210973. The next prime is 166210991. The reversal of 166210990 is 99012661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166210991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11320 + ... + 21460.

It is an arithmetic number, because the mean of its divisors is an integer number (10268775).

Almost surely, 2^166210990 is an apocalyptic number.

166210990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166210990 is a deficient number, since it is larger than the sum of its proper divisors (162389810).

166210990 is a wasteful number, since it uses less digits than its factorization.

166210990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10308.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 166210990 is about 12892.2841265619. The cubic root of 166210990 is about 549.8192133086.

The spelling of 166210990 in words is "one hundred sixty-six million, two hundred ten thousand, nine hundred ninety".