6990651 has 16 divisors (see below), whose sum is σ = 10902400. Its totient is φ = 4414824.

The previous prime is 6990629. The next prime is 6990667. The reversal of 6990651 is 1560996.

It is not a de Polignac number, because 6990651 - 2⁵ = 6990619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6990611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6301 + ... + 7326.

It is an arithmetic number, because the mean of its divisors is an integer number (681400).

Almost surely, 2^6990651 is an apocalyptic number.

6990651 is a deficient number, since it is larger than the sum of its proper divisors (3911749).

6990651 is a wasteful number, since it uses less digits than its factorization.

6990651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13655 (or 13649 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 6990651 is about 2643.9839258210. The cubic root of 6990651 is about 191.2079184614.

The spelling of 6990651 in words is "six million, nine hundred ninety thousand, six hundred fifty-one".