2661102564 has 12 divisors (see below), whose sum is σ = 6209239344. Its totient is φ = 887034184.

The previous prime is 2661102557. The next prime is 2661102593. The reversal of 2661102564 is 4652011662.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×2661102564² = 14162933712254748192, which contains 22 as substring.

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, 110879262 + ... + 110879285.

It is an arithmetic number, because the mean of its divisors is an integer number (517436612).

Almost surely, 2^2661102564 is an apocalyptic number.

It is an amenable number.

2661102564 is an abundant number, since it is smaller than the sum of its proper divisors (3548136780).

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

2661102564 is a wasteful number, since it uses less digits than its factorization.

2661102564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221758554 (or 221758552 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 2661102564 is about 51585.8756250197. The cubic root of 2661102564 is about 1385.7573937832.

The spelling of 2661102564 in words is "two billion, six hundred sixty-one million, one hundred two thousand, five hundred sixty-four".