6659138 has 24 divisors (see below), whose sum is σ = 10908324. Its totient is φ = 3046400.

The previous prime is 6659113. The next prime is 6659201. The reversal of 6659138 is 8319566.

It can be written as a sum of positive squares in 6 ways, for example, as 4012009 + 2647129 = 2003^2 + 1627^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23558 + ... + 23838.

Almost surely, 2^6659138 is an apocalyptic number.

6659138 is a deficient number, since it is larger than the sum of its proper divisors (4249186).

6659138 is a wasteful number, since it uses less digits than its factorization.

6659138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 341 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 6659138 is about 2580.5305656008. The cubic root of 6659138 is about 188.1363316243.

The spelling of 6659138 in words is "six million, six hundred fifty-nine thousand, one hundred thirty-eight".