2162166720 has 112 divisors (see below), whose sum is σ = 7845600768. Its totient is φ = 494208000.

The previous prime is 2162166707. The next prime is 2162166749. The reversal of 2162166720 is 276612612.

It is a tau number, because it is divible by the number of its divisors (112).

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, 154156 + ... + 167595.

Almost surely, 2^2162166720 is an apocalyptic number.

2162166720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2162166720 is an abundant number, since it is smaller than the sum of its proper divisors (5683434048).

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

2162166720 is a wasteful number, since it uses less digits than its factorization.

2162166720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321778 (or 321768 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 2162166720 is about 46499.1045075064. The cubic root of 2162166720 is about 1293.0928970507.

The spelling of 2162166720 in words is "two billion, one hundred sixty-two million, one hundred sixty-six thousand, seven hundred twenty".