6991143676 has 48 divisors (see below), whose sum is σ = 13629974400. Its totient is φ = 3110944320.

The previous prime is 6991143667. The next prime is 6991143707. The reversal of 6991143676 is 6763411996.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 473250 + ... + 487798.

It is an arithmetic number, because the mean of its divisors is an integer number (283957800).

Almost surely, 2^6991143676 is an apocalyptic number.

It is an amenable number.

6991143676 is a deficient number, since it is larger than the sum of its proper divisors (6638830724).

6991143676 is a wasteful number, since it uses less digits than its factorization.

6991143676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14794 (or 14792 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 52.

The square root of 6991143676 is about 83613.0592431589. The cubic root of 6991143676 is about 1912.1241023857.

The spelling of 6991143676 in words is "six billion, nine hundred ninety-one million, one hundred forty-three thousand, six hundred seventy-six".