2660463540 has 288 divisors, whose sum is σ = 9560678400. Its totient is φ = 586165248.

The previous prime is 2660463499. The next prime is 2660463541. The reversal of 2660463540 is 453640662.

2660463540 is a `hidden beast` number, since 2 + 6 + 604 + 6 + 3 + 5 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2660463495 and 2660463504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660463541) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6946189 + ... + 6946571.

It is an arithmetic number, because the mean of its divisors is an integer number (33196800).

Almost surely, 2^2660463540 is an apocalyptic number.

2660463540 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 2660463540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4780339200).

2660463540 is an abundant number, since it is smaller than the sum of its proper divisors (6900214860).

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

2660463540 is a wasteful number, since it uses less digits than its factorization.

2660463540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 2660463540 is about 51579.6814647008. The cubic root of 2660463540 is about 1385.6464619290.

The spelling of 2660463540 in words is "two billion, six hundred sixty million, four hundred sixty-three thousand, five hundred forty".