2774888660 has 12 divisors (see below), whose sum is σ = 5827266228. Its totient is φ = 1109955456.

The previous prime is 2774888653. The next prime is 2774888729. The reversal of 2774888660 is 668884772.

It can be written as a sum of positive squares in 2 ways, for example, as 1543861264 + 1231027396 = 39292^2 + 35086^2 .

It is a super-3 number, since 3×2774888660³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2774888596 and 2774888605.

It is a congruent number.

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, 69372197 + ... + 69372236.

It is an arithmetic number, because the mean of its divisors is an integer number (485605519).

Almost surely, 2^2774888660 is an apocalyptic number.

2774888660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2774888660 is an abundant number, since it is smaller than the sum of its proper divisors (3052377568).

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

2774888660 is a wasteful number, since it uses less digits than its factorization.

2774888660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138744442 (or 138744440 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 56.

The square root of 2774888660 is about 52677.2119611507. The cubic root of 2774888660 is about 1405.2335845138.

The spelling of 2774888660 in words is "two billion, seven hundred seventy-four million, eight hundred eighty-eight thousand, six hundred sixty".