2521008660 has 192 divisors, whose sum is σ = 7491778560. Its totient is φ = 632586240.

The previous prime is 2521008649. The next prime is 2521008689. The reversal of 2521008660 is 668001252.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16057302 + ... + 16057458.

It is an arithmetic number, because the mean of its divisors is an integer number (39019680).

Almost surely, 2^2521008660 is an apocalyptic number.

2521008660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2521008660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3745889280).

2521008660 is an abundant number, since it is smaller than the sum of its proper divisors (4970769900).

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

2521008660 is a wasteful number, since it uses less digits than its factorization.

2521008660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 2521008660 is about 50209.6470810142. The cubic root of 2521008660 is about 1360.9999602301. Note that the first 4 decimals are identical.

The spelling of 2521008660 in words is "two billion, five hundred twenty-one million, eight thousand, six hundred sixty".