6660665550100 has 36 divisors (see below), whose sum is σ = 14761168599744. Its totient is φ = 2607579702880.

The previous prime is 6660665550083. The next prime is 6660665550109. The reversal of 6660665550100 is 10555660666.

It is a super-2 number, since 2×6660665550100² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660665550109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 708576742 + ... + 708586141.

It is an arithmetic number, because the mean of its divisors is an integer number (410032461104).

Almost surely, 2^{6660665550100} is an apocalyptic number.

It is an amenable number.

6660665550100 is an abundant number, since it is smaller than the sum of its proper divisors (8100503049644).

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

6660665550100 is a wasteful number, since it uses less digits than its factorization.

6660665550100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417162944 (or 1417162937 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 6660665550100 in words is "six trillion, six hundred sixty billion, six hundred sixty-five million, five hundred fifty thousand, one hundred".