2661614660 has 12 divisors (see below), whose sum is σ = 5589390828. Its totient is φ = 1064645856.

The previous prime is 2661614651. The next prime is 2661614699. The reversal of 2661614660 is 664161662.

It can be written as a sum of positive squares in 2 ways, for example, as 380406016 + 2281208644 = 19504^2 + 47762^2 .

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, 66540347 + ... + 66540386.

It is an arithmetic number, because the mean of its divisors is an integer number (465782569).

Almost surely, 2^2661614660 is an apocalyptic number.

2661614660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2661614660 is an abundant number, since it is smaller than the sum of its proper divisors (2927776168).

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

2661614660 is a wasteful number, since it uses less digits than its factorization.

2661614660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133080742 (or 133080740 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 2661614660 is about 51590.8389154509. The cubic root of 2661614660 is about 1385.8462786577.

The spelling of 2661614660 in words is "two billion, six hundred sixty-one million, six hundred fourteen thousand, six hundred sixty".