2551666528 has 48 divisors (see below), whose sum is σ = 5103994896. Its totient is φ = 1255495680.

The previous prime is 2551666499. The next prime is 2551666543. The reversal of 2551666528 is 8256661552.

It is a super-2 number, since 2×2551666528² = 13022004140231149568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1332900 + ... + 1334812.

It is an arithmetic number, because the mean of its divisors is an integer number (106333227).

Almost surely, 2^2551666528 is an apocalyptic number.

It is an amenable number.

2551666528 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

2551666528 is a wasteful number, since it uses less digits than its factorization.

2551666528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567 (or 2559 counting only the distinct ones).

The product of its digits is 864000, while the sum is 46.

The square root of 2551666528 is about 50514.0230827045. The cubic root of 2551666528 is about 1366.4947649212.

The spelling of 2551666528 in words is "two billion, five hundred fifty-one million, six hundred sixty-six thousand, five hundred twenty-eight".