1266344660 has 48 divisors (see below), whose sum is σ = 3042869760. Its totient is φ = 433655040.

The previous prime is 1266344657. The next prime is 1266344701. The reversal of 1266344660 is 664436621.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122576 + ... + 132504.

It is an arithmetic number, because the mean of its divisors is an integer number (63393120).

Almost surely, 2^1266344660 is an apocalyptic number.

1266344660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266344660 is an abundant number, since it is smaller than the sum of its proper divisors (1776525100).

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

1266344660 is a wasteful number, since it uses less digits than its factorization.

1266344660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10856 (or 10854 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 1266344660 is about 35585.7367494338. The cubic root of 1266344660 is about 1081.8921619594.

The spelling of 1266344660 in words is "one billion, two hundred sixty-six million, three hundred forty-four thousand, six hundred sixty".