6694864418 has 24 divisors (see below), whose sum is σ = 11687541516. Its totient is φ = 2864111360.

The previous prime is 6694864417. The next prime is 6694864483. The reversal of 6694864418 is 8144684966.

It can be written as a sum of positive squares in 2 ways, for example, as 6312779209 + 382085209 = 79453^2 + 19547^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6694864417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 809555 + ... + 817782.

Almost surely, 2^6694864418 is an apocalyptic number.

6694864418 is a deficient number, since it is larger than the sum of its proper divisors (4992677098).

6694864418 is a wasteful number, since it uses less digits than its factorization.

6694864418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627378 (or 1627367 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 56.

The square root of 6694864418 is about 81822.1511450292. The cubic root of 6694864418 is about 1884.7218353714.

The spelling of 6694864418 in words is "six billion, six hundred ninety-four million, eight hundred sixty-four thousand, four hundred eighteen".