2660511540 has 48 divisors (see below), whose sum is σ = 7452244800. Its totient is φ = 709201920.

The previous prime is 2660511493. The next prime is 2660511559. The reversal of 2660511540 is 451150662.

2660511540 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2660511498 and 2660511507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191220 + ... + 204660.

It is an arithmetic number, because the mean of its divisors is an integer number (155255100).

Almost surely, 2^2660511540 is an apocalyptic number.

2660511540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2660511540 is an abundant number, since it is smaller than the sum of its proper divisors (4791733260).

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

2660511540 is a wasteful number, since it uses less digits than its factorization.

2660511540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16752 (or 16750 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 2660511540 is about 51580.1467621022. The cubic root of 2660511540 is about 1385.6547951423.

The spelling of 2660511540 in words is "two billion, six hundred sixty million, five hundred eleven thousand, five hundred forty".