166641666290 has 16 divisors (see below), whose sum is σ = 327223635840. Its totient is φ = 60596969520.

The previous prime is 166641666253. The next prime is 166641666311. The reversal of 166641666290 is 92666146661.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 757462010 + ... + 757462229.

It is an arithmetic number, because the mean of its divisors is an integer number (20451477240).

Almost surely, 2^166641666290 is an apocalyptic number.

166641666290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166641666290 is a deficient number, since it is larger than the sum of its proper divisors (160581969550).

166641666290 is a wasteful number, since it uses less digits than its factorization.

166641666290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514924257.

The product of its (nonzero) digits is 3359232, while the sum is 53.

The spelling of 166641666290 in words is "one hundred sixty-six billion, six hundred forty-one million, six hundred sixty-six thousand, two hundred ninety".