2140166665 has 16 divisors (see below), whose sum is σ = 3160862208. Its totient is φ = 1354654656.

The previous prime is 2140166641. The next prime is 2140166681. The reversal of 2140166665 is 5666610412.

It is a cyclic number.

It is not a de Polignac number, because 2140166665 - 2⁹ = 2140166153 is a prime.

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, 2351377 + ... + 2352286.

It is an arithmetic number, because the mean of its divisors is an integer number (197553888).

Almost surely, 2^2140166665 is an apocalyptic number.

It is an amenable number.

2140166665 is a deficient number, since it is larger than the sum of its proper divisors (1020695543).

2140166665 is a wasteful number, since it uses less digits than its factorization.

2140166665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4703688.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 2140166665 is about 46261.9353788836. The cubic root of 2140166665 is about 1288.6921956159.

The spelling of 2140166665 in words is "two billion, one hundred forty million, one hundred sixty-six thousand, six hundred sixty-five".