1265700660 has 96 divisors (see below), whose sum is σ = 4288515840. Its totient is φ = 272283648.

The previous prime is 1265700629. The next prime is 1265700671. The reversal of 1265700660 is 660075621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81495 + ... + 95774.

It is an arithmetic number, because the mean of its divisors is an integer number (44672040).

Almost surely, 2^1265700660 is an apocalyptic number.

1265700660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265700660 is an abundant number, since it is smaller than the sum of its proper divisors (3022815180).

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

1265700660 is a wasteful number, since it uses less digits than its factorization.

1265700660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177305 (or 177303 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 1265700660 is about 35576.6870295704. The cubic root of 1265700660 is about 1081.7087319880.

The spelling of 1265700660 in words is "one billion, two hundred sixty-five million, seven hundred thousand, six hundred sixty".