6638125 has 40 divisors (see below), whose sum is σ = 9621920. Its totient is φ = 4536000.

The previous prime is 6638101. The next prime is 6638131. The reversal of 6638125 is 5218366.

It is not a de Polignac number, because 6638125 - 2⁷ = 6637997 is a prime.

Its product of digits (8640) is a multiple of the sum of its prime divisors (80).

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 154354 + ... + 154396.

It is an arithmetic number, because the mean of its divisors is an integer number (240548).

Almost surely, 2^6638125 is an apocalyptic number.

6638125 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6638125 is a deficient number, since it is larger than the sum of its proper divisors (2983795).

6638125 is a wasteful number, since it uses less digits than its factorization.

6638125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 80 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 6638125 is about 2576.4558990986. The cubic root of 6638125 is about 187.9382341988.

The spelling of 6638125 in words is "six million, six hundred thirty-eight thousand, one hundred twenty-five".