6638875 has 16 divisors (see below), whose sum is σ = 8360352. Its totient is φ = 5263200.

The previous prime is 6638851. The next prime is 6638893. The reversal of 6638875 is 5788366.

6638875 = T₁₈₆ + T₁₈₇ + ... + T₃₅₈.

It is not a de Polignac number, because 6638875 - 2⁹ = 6638363 is a prime.

It is a super-2 number, since 2×6638875² = 88149322531250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21472 + ... + 21778.

It is an arithmetic number, because the mean of its divisors is an integer number (522522).

Almost surely, 2^6638875 is an apocalyptic number.

6638875 is a deficient number, since it is larger than the sum of its proper divisors (1721477).

6638875 is a wasteful number, since it uses less digits than its factorization.

6638875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 485 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 6638875 is about 2576.6014437627. The cubic root of 6638875 is about 187.9453119187.

The spelling of 6638875 in words is "six million, six hundred thirty-eight thousand, eight hundred seventy-five".