6691630081 has 24 divisors (see below), whose sum is σ = 6994584000. Its totient is φ = 6399372000.

The previous prime is 6691630037. The next prime is 6691630091. The reversal of 6691630081 is 1800361966.

It is not a de Polignac number, because 6691630081 - 2¹¹ = 6691628033 is a prime.

It is a super-2 number, since 2×6691630081² = 89555826281888133122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6691630091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44315356 + ... + 44315506.

It is an arithmetic number, because the mean of its divisors is an integer number (291441000).

Almost surely, 2^6691630081 is an apocalyptic number.

It is an amenable number.

6691630081 is a deficient number, since it is larger than the sum of its proper divisors (302953919).

6691630081 is a wasteful number, since it uses less digits than its factorization.

6691630081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 6691630081 is about 81802.3843234413. The cubic root of 6691630081 is about 1884.4182789389.

The spelling of 6691630081 in words is "six billion, six hundred ninety-one million, six hundred thirty thousand, eighty-one".