6663704636 has 24 divisors (see below), whose sum is σ = 11717551104. Its totient is φ = 3315861360.

The previous prime is 6663704627. The next prime is 6663704639. The reversal of 6663704636 is 6364073666.

It is a happy number.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6663704639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1149401 + ... + 1155183.

It is an arithmetic number, because the mean of its divisors is an integer number (488231296).

Almost surely, 2^6663704636 is an apocalyptic number.

It is an amenable number.

6663704636 is a deficient number, since it is larger than the sum of its proper divisors (5053846468).

6663704636 is a wasteful number, since it uses less digits than its factorization.

6663704636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7121 (or 7119 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 47.

The square root of 6663704636 is about 81631.5174182129. The cubic root of 6663704636 is about 1881.7932787128.

The spelling of 6663704636 in words is "six billion, six hundred sixty-three million, seven hundred four thousand, six hundred thirty-six".