2166739764 has 48 divisors (see below), whose sum is σ = 5872707456. Its totient is φ = 608918400.

The previous prime is 2166739753. The next prime is 2166739781. The reversal of 2166739764 is 4679376612.

It is a super-2 number, since 2×2166739764² = 9389522409797551392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206307 + ... + 216554.

It is an arithmetic number, because the mean of its divisors is an integer number (122348072).

Almost surely, 2^2166739764 is an apocalyptic number.

It is an amenable number.

2166739764 is an abundant number, since it is smaller than the sum of its proper divisors (3705967692).

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

2166739764 is a wasteful number, since it uses less digits than its factorization.

2166739764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422936 (or 422934 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 51.

The square root of 2166739764 is about 46548.2519972555. The cubic root of 2166739764 is about 1294.0038978181.

The spelling of 2166739764 in words is "two billion, one hundred sixty-six million, seven hundred thirty-nine thousand, seven hundred sixty-four".