6615620250 has 128 divisors (see below), whose sum is σ = 16842608640. Its totient is φ = 1729224000.

The previous prime is 6615620191. The next prime is 6615620257. The reversal of 6615620250 is 520265166.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6615620257) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15069531 + ... + 15069969.

It is an arithmetic number, because the mean of its divisors is an integer number (131582880).

Almost surely, 2^6615620250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6615620250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8421304320).

6615620250 is an abundant number, since it is smaller than the sum of its proper divisors (10226988390).

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

6615620250 is a wasteful number, since it uses less digits than its factorization.

6615620250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 6615620250 is about 81336.4632252964. The cubic root of 6615620250 is about 1877.2560931567.

The spelling of 6615620250 in words is "six billion, six hundred fifteen million, six hundred twenty thousand, two hundred fifty".