2748561660 has 240 divisors, whose sum is σ = 9775735200. Its totient is φ = 640866816.

The previous prime is 2748561659. The next prime is 2748561667. The reversal of 2748561660 is 661658472.

2748561660 is a `hidden beast` number, since 2 + 7 + 485 + 6 + 166 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2748561667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 396706 + ... + 403574.

It is an arithmetic number, because the mean of its divisors is an integer number (40732230).

Almost surely, 2^2748561660 is an apocalyptic number.

2748561660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2748561660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4887867600).

2748561660 is an abundant number, since it is smaller than the sum of its proper divisors (7027173540).

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

2748561660 is a wasteful number, since it uses less digits than its factorization.

2748561660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6922 (or 6911 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 2748561660 is about 52426.7265810102. The cubic root of 2748561660 is about 1400.7753630179.

The spelling of 2748561660 in words is "two billion, seven hundred forty-eight million, five hundred sixty-one thousand, six hundred sixty".