2665039408 has 40 divisors (see below), whose sum is σ = 5755011120. Its totient is φ = 1188126720.

The previous prime is 2665039393. The next prime is 2665039451. The reversal of 2665039408 is 8049305662.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252673 + ... + 263008.

It is an arithmetic number, because the mean of its divisors is an integer number (143875278).

Almost surely, 2^2665039408 is an apocalyptic number.

It is an amenable number.

2665039408 is an abundant number, since it is smaller than the sum of its proper divisors (3089971712).

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

2665039408 is a wasteful number, since it uses less digits than its factorization.

2665039408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515725 (or 515719 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 2665039408 is about 51624.0196807649. The cubic root of 2665039408 is about 1386.4404217711.

The spelling of 2665039408 in words is "two billion, six hundred sixty-five million, thirty-nine thousand, four hundred eight".