2166258402 has 96 divisors (see below), whose sum is σ = 5900529024. Its totient is φ = 562620960.

The previous prime is 2166258383. The next prime is 2166258463. The reversal of 2166258402 is 2048526612.

It is a happy number.

2166258402 is a `hidden beast` number, since 2 + 16 + 62 + 584 + 0 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 161248 + ... + 174164.

It is an arithmetic number, because the mean of its divisors is an integer number (61463844).

Almost surely, 2^2166258402 is an apocalyptic number.

2166258402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2166258402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2950264512).

2166258402 is an abundant number, since it is smaller than the sum of its proper divisors (3734270622).

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

2166258402 is a wasteful number, since it uses less digits than its factorization.

2166258402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12965 (or 12940 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 2166258402 is about 46543.0811399503. The cubic root of 2166258402 is about 1293.9080655995.

The spelling of 2166258402 in words is "two billion, one hundred sixty-six million, two hundred fifty-eight thousand, four hundred two".