2166306528 has 24 divisors (see below), whose sum is σ = 5686554888. Its totient is φ = 722102144.

The previous prime is 2166306523. The next prime is 2166306533. The reversal of 2166306528 is 8256036612.

It is an interprime number because it is at equal distance from previous prime (2166306523) and next prime (2166306533).

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166306523) 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, 11282751 + ... + 11282942.

It is an arithmetic number, because the mean of its divisors is an integer number (236939787).

Almost surely, 2^2166306528 is an apocalyptic number.

It is an amenable number.

2166306528 is an abundant number, since it is smaller than the sum of its proper divisors (3520248360).

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

2166306528 is a wasteful number, since it uses less digits than its factorization.

2166306528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22565706 (or 22565698 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 2166306528 is about 46543.5981419572. The cubic root of 2166306528 is about 1293.9176474294.

The spelling of 2166306528 in words is "two billion, one hundred sixty-six million, three hundred six thousand, five hundred twenty-eight".