166199090 has 16 divisors (see below), whose sum is σ = 299643840. Its totient is φ = 66371760.

The previous prime is 166199069. The next prime is 166199093. The reversal of 166199090 is 90991661.

It is not an unprimeable number, because it can be changed into a prime (166199093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6860 + ... + 19479.

It is an arithmetic number, because the mean of its divisors is an integer number (18727740).

Almost surely, 2^166199090 is an apocalyptic number.

166199090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166199090 is a deficient number, since it is larger than the sum of its proper divisors (133444750).

166199090 is a wasteful number, since it uses less digits than its factorization.

166199090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26977.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 166199090 is about 12891.8226019442. The cubic root of 166199090 is about 549.8060914230.

The spelling of 166199090 in words is "one hundred sixty-six million, one hundred ninety-nine thousand, ninety".