6637290725 has 48 divisors (see below), whose sum is σ = 8968176000. Its totient is φ = 4843825920.

The previous prime is 6637290721. The next prime is 6637290731. The reversal of 6637290725 is 5270927366.

It is a happy number.

It is not a de Polignac number, because 6637290725 - 2² = 6637290721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6637290725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6637290721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18488096 + ... + 18488454.

It is an arithmetic number, because the mean of its divisors is an integer number (186837000).

Almost surely, 2^6637290725 is an apocalyptic number.

6637290725 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6637290725 is a deficient number, since it is larger than the sum of its proper divisors (2330885275).

6637290725 is a wasteful number, since it uses less digits than its factorization.

6637290725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894 (or 889 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 47.

The square root of 6637290725 is about 81469.5693188567. The cubic root of 6637290725 is about 1879.3036055279.

The spelling of 6637290725 in words is "six billion, six hundred thirty-seven million, two hundred ninety thousand, seven hundred twenty-five".