2521666132 has 12 divisors (see below), whose sum is σ = 4520548116. Its totient is φ = 1230080960.

The previous prime is 2521666109. The next prime is 2521666159. The reversal of 2521666132 is 2316661252.

It can be written as a sum of positive squares in 2 ways, for example, as 1422345796 + 1099320336 = 37714^2 + 33156^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7687843 + ... + 7688170.

It is an arithmetic number, because the mean of its divisors is an integer number (376712343).

Almost surely, 2^2521666132 is an apocalyptic number.

It is an amenable number.

2521666132 is a deficient number, since it is larger than the sum of its proper divisors (1998881984).

2521666132 is a wasteful number, since it uses less digits than its factorization.

2521666132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15376058 (or 15376056 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 2521666132 is about 50216.1939218814. The cubic root of 2521666132 is about 1361.1182649392.

The spelling of 2521666132 in words is "two billion, five hundred twenty-one million, six hundred sixty-six thousand, one hundred thirty-two".