2166872560 has 20 divisors (see below), whose sum is σ = 5037978888. Its totient is φ = 866748992.

The previous prime is 2166872557. The next prime is 2166872563. The reversal of 2166872560 is 652786612.

It is an interprime number because it is at equal distance from previous prime (2166872557) and next prime (2166872563).

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166872563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13542874 + ... + 13543033.

Almost surely, 2^2166872560 is an apocalyptic number.

2166872560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2166872560 is an abundant number, since it is smaller than the sum of its proper divisors (2871106328).

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

2166872560 is a wasteful number, since it uses less digits than its factorization.

2166872560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27085920 (or 27085914 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 2166872560 is about 46549.6784092006. The cubic root of 2166872560 is about 1294.0303330849.

The spelling of 2166872560 in words is "two billion, one hundred sixty-six million, eight hundred seventy-two thousand, five hundred sixty".