1266365133 has 48 divisors (see below), whose sum is σ = 2054946816. Its totient is φ = 744901920.

The previous prime is 1266365129. The next prime is 1266365153. The reversal of 1266365133 is 3315636621.

1266365133 is a `hidden beast` number, since 1 + 2 + 6 + 636 + 5 + 13 + 3 = 666.

It is not a de Polignac number, because 1266365133 - 2² = 1266365129 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266365153) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 589860 + ... + 592002.

It is an arithmetic number, because the mean of its divisors is an integer number (42811392).

Almost surely, 2^1266365133 is an apocalyptic number.

It is an amenable number.

1266365133 is a deficient number, since it is larger than the sum of its proper divisors (788581683).

1266365133 is a wasteful number, since it uses less digits than its factorization.

1266365133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334 (or 2331 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 1266365133 is about 35586.0244056568. The cubic root of 1266365133 is about 1081.8979922465.

It can be divided in two parts, 126636 and 5133, that added together give a square (131769 = 363²).

The spelling of 1266365133 in words is "one billion, two hundred sixty-six million, three hundred sixty-five thousand, one hundred thirty-three".