6991466769 has 48 divisors (see below), whose sum is σ = 12062843520. Its totient is φ = 3817497600.

The previous prime is 6991466753. The next prime is 6991466771. The reversal of 6991466769 is 9676641996.

It is not a de Polignac number, because 6991466769 - 2⁴ = 6991466753 is a prime.

It is a super-2 number, since 2×6991466769² = 97761215164062598722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6991466789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157494 + ... + 196944.

It is an arithmetic number, because the mean of its divisors is an integer number (251309240).

Almost surely, 2^6991466769 is an apocalyptic number.

It is an amenable number.

6991466769 is a deficient number, since it is larger than the sum of its proper divisors (5071376751).

6991466769 is a wasteful number, since it uses less digits than its factorization.

6991466769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39590 (or 39587 counting only the distinct ones).

The product of its digits is 26453952, while the sum is 63.

The square root of 6991466769 is about 83614.9912934278. The cubic root of 6991466769 is about 1912.1535579571.

The spelling of 6991466769 in words is "six billion, nine hundred ninety-one million, four hundred sixty-six thousand, seven hundred sixty-nine".