2551654660 has 24 divisors (see below), whose sum is σ = 5361897240. Its totient is φ = 1020009984.

The previous prime is 2551654657. The next prime is 2551654673. The reversal of 2551654660 is 664561552.

It can be written as a sum of positive squares in 4 ways, for example, as 5846724 + 2545807936 = 2418^2 + 50456^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8005 + ... + 71884.

It is an arithmetic number, because the mean of its divisors is an integer number (223412385).

Almost surely, 2^2551654660 is an apocalyptic number.

2551654660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2551654660 is an abundant number, since it is smaller than the sum of its proper divisors (2810242580).

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

2551654660 is a wasteful number, since it uses less digits than its factorization.

2551654660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81495 (or 81493 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The square root of 2551654660 is about 50513.9056102377. The cubic root of 2551654660 is about 1366.4926463600.

The spelling of 2551654660 in words is "two billion, five hundred fifty-one million, six hundred fifty-four thousand, six hundred sixty".