101661656660 has 12 divisors (see below), whose sum is σ = 213489479028. Its totient is φ = 40664662656.

The previous prime is 101661656647. The next prime is 101661656683. The reversal of 101661656660 is 66656166101.

It can be written as a sum of positive squares in 2 ways, for example, as 59647315984 + 42014340676 = 244228^2 + 204974^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2541541397 + ... + 2541541436.

It is an arithmetic number, because the mean of its divisors is an integer number (17790789919).

Almost surely, 2^101661656660 is an apocalyptic number.

101661656660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101661656660 is an abundant number, since it is smaller than the sum of its proper divisors (111827822368).

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

101661656660 is a wasteful number, since it uses less digits than its factorization.

101661656660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5083082842 (or 5083082840 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 101661656660 in words is "one hundred one billion, six hundred sixty-one million, six hundred fifty-six thousand, six hundred sixty".