6881944065660 has 36 divisors (see below), whose sum is σ = 20875230333048. Its totient is φ = 1835185084128.

The previous prime is 6881944065569. The next prime is 6881944065709. The reversal of 6881944065660 is 665604491886.

6881944065660 is a `hidden beast` number, since 6 + 8 + 81 + 9 + 440 + 6 + 56 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×6881944065660² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19116511114 + ... + 19116511473.

Almost surely, 2^{6881944065660} is an apocalyptic number.

6881944065660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6881944065660 is an abundant number, since it is smaller than the sum of its proper divisors (13993286267388).

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

6881944065660 is a wasteful number, since it uses less digits than its factorization.

6881944065660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38233022602 (or 38233022597 counting only the distinct ones).

The product of its (nonzero) digits is 59719680, while the sum is 63.

The spelling of 6881944065660 in words is "six trillion, eight hundred eighty-one billion, nine hundred forty-four million, sixty-five thousand, six hundred sixty".