2661886851900 has 72 divisors (see below), whose sum is σ = 7732410344064. Its totient is φ = 707008440000.

The previous prime is 2661886851851. The next prime is 2661886851901. The reversal of 2661886851900 is 91586881662.

It is a super-2 number, since 2×2661886851900² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661886851901) 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, 17599912 + ... + 17750511.

It is an arithmetic number, because the mean of its divisors is an integer number (107394588112).

Almost surely, 2^{2661886851900} is an apocalyptic number.

2661886851900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2661886851900 is an abundant number, since it is smaller than the sum of its proper divisors (5070523492164).

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

2661886851900 is a wasteful number, since it uses less digits than its factorization.

2661886851900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35350691 (or 35350684 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 60.

The spelling of 2661886851900 in words is "two trillion, six hundred sixty-one billion, eight hundred eighty-six million, eight hundred fifty-one thousand, nine hundred".