166890093 has 8 divisors (see below), whose sum is σ = 232195008. Its totient is φ = 106422624.

The previous prime is 166890089. The next prime is 166890103. The reversal of 166890093 is 390098661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166890093 - 2² = 166890089 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166890023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1209280 + ... + 1209417.

It is an arithmetic number, because the mean of its divisors is an integer number (29024376).

Almost surely, 2^166890093 is an apocalyptic number.

It is an amenable number.

166890093 is a deficient number, since it is larger than the sum of its proper divisors (65304915).

166890093 is a wasteful number, since it uses less digits than its factorization.

166890093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418723.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 166890093 is about 12918.5948539305. The cubic root of 166890093 is about 550.5670108436.

The spelling of 166890093 in words is "one hundred sixty-six million, eight hundred ninety thousand, ninety-three".