2166250720 has 24 divisors (see below), whose sum is σ = 5117767704. Its totient is φ = 866500224.

The previous prime is 2166250717. The next prime is 2166250739. The reversal of 2166250720 is 270526612.

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 3 ways as a sum of consecutive naturals, for example, 6769374 + ... + 6769693.

It is an arithmetic number, because the mean of its divisors is an integer number (213240321).

Almost surely, 2^2166250720 is an apocalyptic number.

2166250720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2166250720 is an abundant number, since it is smaller than the sum of its proper divisors (2951516984).

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

2166250720 is a wasteful number, since it uses less digits than its factorization.

2166250720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13539082 (or 13539074 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2166250720 is about 46542.9986141847. The cubic root of 2166250720 is about 1293.9065361092.

The spelling of 2166250720 in words is "two billion, one hundred sixty-six million, two hundred fifty thousand, seven hundred twenty".