6651015660660 has 96 divisors (see below), whose sum is σ = 21332631785472. Its totient is φ = 1516704888960.

The previous prime is 6651015660631. The next prime is 6651015660673. The reversal of 6651015660660 is 660665101566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18189922 + ... + 18551961.

It is an arithmetic number, because the mean of its divisors is an integer number (222214914432).

Almost surely, 2^{6651015660660} is an apocalyptic number.

6651015660660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6651015660660 is an abundant number, since it is smaller than the sum of its proper divisors (14681616124812).

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

6651015660660 is a wasteful number, since it uses less digits than its factorization.

6651015660660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36742333 (or 36742331 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 6651015660660 in words is "six trillion, six hundred fifty-one billion, fifteen million, six hundred sixty thousand, six hundred sixty".