166415290 has 16 divisors (see below), whose sum is σ = 301458312. Its totient is φ = 66141504.

The previous prime is 166415287. The next prime is 166415309. The reversal of 166415290 is 92514661.

It can be written as a sum of positive squares in 4 ways, for example, as 106646929 + 59768361 = 10327^2 + 7731^2 .

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 7 ways as a sum of consecutive naturals, for example, 51429 + ... + 54568.

Almost surely, 2^166415290 is an apocalyptic number.

166415290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166415290 is a deficient number, since it is larger than the sum of its proper divisors (135043022).

166415290 is a wasteful number, since it uses less digits than its factorization.

166415290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106161.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 166415290 is about 12900.2050371302. The cubic root of 166415290 is about 550.0443931109.

The spelling of 166415290 in words is "one hundred sixty-six million, four hundred fifteen thousand, two hundred ninety".