1266338464 has 24 divisors (see below), whose sum is σ = 2553913908. Its totient is φ = 617725440.

The previous prime is 1266338461. The next prime is 1266338471. The reversal of 1266338464 is 4648336621.

It can be written as a sum of positive squares in 2 ways, for example, as 1259682064 + 6656400 = 35492^2 + 2580^2 .

It is a super-2 number, since 2×1266338464² = 3207226210811758592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1266338464.

It is not an unprimeable number, because it can be changed into a prime (1266338461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481287 + ... + 483910.

Almost surely, 2^1266338464 is an apocalyptic number.

It is an amenable number.

1266338464 is an abundant number, since it is smaller than the sum of its proper divisors (1287575444).

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

1266338464 is an equidigital number, since it uses as much as digits as its factorization.

1266338464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965248 (or 965240 counting only the distinct ones).

The product of its digits is 497664, while the sum is 43.

The square root of 1266338464 is about 35585.6496919756. The cubic root of 1266338464 is about 1081.8903974543.

The spelling of 1266338464 in words is "one billion, two hundred sixty-six million, three hundred thirty-eight thousand, four hundred sixty-four".