2661102558 has 80 divisors (see below), whose sum is σ = 6298845696. Its totient is φ = 838388880.

The previous prime is 2661102557. The next prime is 2661102593. The reversal of 2661102558 is 8552011662.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661102557) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 209785 + ... + 222107.

Almost surely, 2^2661102558 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2661102558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3149422848).

2661102558 is an abundant number, since it is smaller than the sum of its proper divisors (3637743138).

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

2661102558 is a wasteful number, since it uses less digits than its factorization.

2661102558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12411 (or 12402 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 2661102558 is about 51585.8755668642. The cubic root of 2661102558 is about 1385.7573927417.

The spelling of 2661102558 in words is "two billion, six hundred sixty-one million, one hundred two thousand, five hundred fifty-eight".