6691305944 has 64 divisors (see below), whose sum is σ = 13667875200. Its totient is φ = 3058585600.

The previous prime is 6691305941. The next prime is 6691305967. The reversal of 6691305944 is 4495031966.

It is a happy number.

It is a super-2 number, since 2×6691305944² = 89547150472419462272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691305941) 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, 1330154 + ... + 1335174.

It is an arithmetic number, because the mean of its divisors is an integer number (213560550).

Almost surely, 2^6691305944 is an apocalyptic number.

It is an amenable number.

6691305944 is an abundant number, since it is smaller than the sum of its proper divisors (6976569256).

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

6691305944 is a wasteful number, since it uses less digits than its factorization.

6691305944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5324 (or 5320 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 6691305944 is about 81800.4030796915. The cubic root of 6691305944 is about 1884.3878518958.

The spelling of 6691305944 in words is "six billion, six hundred ninety-one million, three hundred five thousand, nine hundred forty-four".