166240290 has 32 divisors (see below), whose sum is σ = 411849216. Its totient is φ = 42900480.

The previous prime is 166240231. The next prime is 166240301. The reversal of 166240290 is 92042661.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88447 + ... + 90306.

It is an arithmetic number, because the mean of its divisors is an integer number (12870288).

Almost surely, 2^166240290 is an apocalyptic number.

166240290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166240290 is an abundant number, since it is smaller than the sum of its proper divisors (245608926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166240290 is a wasteful number, since it uses less digits than its factorization.

166240290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178794.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 166240290 is about 12893.4204150799. The cubic root of 166240290 is about 549.8515191476.

The spelling of 166240290 in words is "one hundred sixty-six million, two hundred forty thousand, two hundred ninety".