6991035768 has 48 divisors (see below), whose sum is σ = 18962915400. Its totient is φ = 2326793280.

The previous prime is 6991035763. The next prime is 6991035791. The reversal of 6991035768 is 8675301996.

6991035768 is a `hidden beast` number, since 69 + 9 + 1 + 0 + 3 + 576 + 8 = 666.

It is a super-2 number, since 2×6991035768² = 97749162218910699648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6991035763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26223 + ... + 121118.

Almost surely, 2^6991035768 is an apocalyptic number.

It is an amenable number.

6991035768 is an abundant number, since it is smaller than the sum of its proper divisors (11971879632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6991035768 is a wasteful number, since it uses less digits than its factorization.

6991035768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148012 (or 148005 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 6991035768 is about 83612.4139586940. The cubic root of 6991035768 is about 1912.1142644842.

The spelling of 6991035768 in words is "six billion, nine hundred ninety-one million, thirty-five thousand, seven hundred sixty-eight".