2665681320 has 64 divisors (see below), whose sum is σ = 8255024640. Its totient is φ = 687916800.

The previous prime is 2665681283. The next prime is 2665681331. The reversal of 2665681320 is 231865662.

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, 354571 + ... + 362010.

It is an arithmetic number, because the mean of its divisors is an integer number (128984760).

Almost surely, 2^2665681320 is an apocalyptic number.

2665681320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2665681320 is an abundant number, since it is smaller than the sum of its proper divisors (5589343320).

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

2665681320 is a wasteful number, since it uses less digits than its factorization.

2665681320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716626 (or 716622 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 2665681320 is about 51630.2364898709. The cubic root of 2665681320 is about 1386.5517273546.

The spelling of 2665681320 in words is "two billion, six hundred sixty-five million, six hundred eighty-one thousand, three hundred twenty".