6643625674 has 8 divisors (see below), whose sum is σ = 11389072608. Its totient is φ = 2847268140.

The previous prime is 6643625663. The next prime is 6643625701. The reversal of 6643625674 is 4765263466.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237272332 + ... + 237272359.

It is an arithmetic number, because the mean of its divisors is an integer number (1423634076).

Almost surely, 2^6643625674 is an apocalyptic number.

6643625674 is a deficient number, since it is larger than the sum of its proper divisors (4745446934).

6643625674 is a wasteful number, since it uses less digits than its factorization.

6643625674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474544700.

The product of its digits is 4354560, while the sum is 49.

The square root of 6643625674 is about 81508.4392808499. The cubic root of 6643625674 is about 1879.9013146101.

The spelling of 6643625674 in words is "six billion, six hundred forty-three million, six hundred twenty-five thousand, six hundred seventy-four".