2166623502 has 32 divisors (see below), whose sum is σ = 4411992480. Its totient is φ = 709171200.

The previous prime is 2166623491. The next prime is 2166623539. The reversal of 2166623502 is 2053266612.

It is a congruent 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, 89502 + ... + 111102.

It is an arithmetic number, because the mean of its divisors is an integer number (137874765).

Almost surely, 2^2166623502 is an apocalyptic number.

2166623502 is an abundant number, since it is smaller than the sum of its proper divisors (2245368978).

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

2166623502 is a wasteful number, since it uses less digits than its factorization.

2166623502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21908.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 2166623502 is about 46547.0031473563. The cubic root of 2166623502 is about 1293.9807530340.

The spelling of 2166623502 in words is "two billion, one hundred sixty-six million, six hundred twenty-three thousand, five hundred two".