6997908868 has 6 divisors (see below), whose sum is σ = 12246340526. Its totient is φ = 3498954432.

The previous prime is 6997908847. The next prime is 6997908919. The reversal of 6997908868 is 8688097996.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4732339264 + 2265569604 = 68792^2 + 47598^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6997908797 and 6997908806.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 874738605 + ... + 874738612.

Almost surely, 2^6997908868 is an apocalyptic number.

It is an amenable number.

6997908868 is a deficient number, since it is larger than the sum of its proper divisors (5248431658).

6997908868 is a wasteful number, since it uses less digits than its factorization.

6997908868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749477221 (or 1749477219 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 70.

The square root of 6997908868 is about 83653.5048159968. The cubic root of 6997908868 is about 1912.7406784864.

The spelling of 6997908868 in words is "six billion, nine hundred ninety-seven million, nine hundred eight thousand, eight hundred sixty-eight".