6625157994 has 480 divisors, whose sum is σ = 20393049600. Its totient is φ = 1587237120.

The previous prime is 6625157989. The next prime is 6625158011. The reversal of 6625157994 is 4997515266.

6625157994 is a `hidden beast` number, since 6 + 62 + 5 + 1 + 579 + 9 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (4082400) is a multiple of the sum of its prime factors (200).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6625157994.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 60781212 + ... + 60781320.

It is an arithmetic number, because the mean of its divisors is an integer number (42485520).

Almost surely, 2^6625157994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6625157994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10196524800).

6625157994 is an abundant number, since it is smaller than the sum of its proper divisors (13767891606).

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

6625157994 is a wasteful number, since it uses less digits than its factorization.

6625157994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 184 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The square root of 6625157994 is about 81395.0735241390. The cubic root of 6625157994 is about 1878.1578070701.

The spelling of 6625157994 in words is "six billion, six hundred twenty-five million, one hundred fifty-seven thousand, nine hundred ninety-four".