2660571540 has 72 divisors (see below), whose sum is σ = 8804079648. Its totient is φ = 644986560.

The previous prime is 2660571533. The next prime is 2660571583. The reversal of 2660571540 is 451750662.

It is a happy number.

2660571540 is a `hidden beast` number, since 2 + 6 + 60 + 57 + 1 + 540 = 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 = 2660571495 and 2660571504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 669882 + ... + 673841.

It is an arithmetic number, because the mean of its divisors is an integer number (122278884).

Almost surely, 2^2660571540 is an apocalyptic number.

2660571540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2660571540 is an abundant number, since it is smaller than the sum of its proper divisors (6143508108).

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

2660571540 is a wasteful number, since it uses less digits than its factorization.

2660571540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343749 (or 1343744 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 2660571540 is about 51580.7283779514. The cubic root of 2660571540 is about 1385.6652115179.

The spelling of 2660571540 in words is "two billion, six hundred sixty million, five hundred seventy-one thousand, five hundred forty".