6693599138 has 16 divisors (see below), whose sum is σ = 10081874616. Its totient is φ = 3333000960.

The previous prime is 6693599123. The next prime is 6693599153. The reversal of 6693599138 is 8319953966.

It is an interprime number because it is at equal distance from previous prime (6693599123) and next prime (6693599153).

It can be written as a sum of positive squares in 4 ways, for example, as 6479767009 + 213832129 = 80497^2 + 14623^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540698 + ... + 552938.

Almost surely, 2^6693599138 is an apocalyptic number.

6693599138 is a deficient number, since it is larger than the sum of its proper divisors (3388275478).

6693599138 is a wasteful number, since it uses less digits than its factorization.

6693599138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13349.

The product of its digits is 9447840, while the sum is 59.

The square root of 6693599138 is about 81814.4188881153. The cubic root of 6693599138 is about 1884.6030950484.

The spelling of 6693599138 in words is "six billion, six hundred ninety-three million, five hundred ninety-nine thousand, one hundred thirty-eight".