1266267564 has 18 divisors (see below), whose sum is σ = 3200843100. Its totient is φ = 422089176.

The previous prime is 1266267547. The next prime is 1266267577. The reversal of 1266267564 is 4657626621.

1266267564 is a `hidden beast` number, since 1 + 2 + 66 + 26 + 7 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17587014 + ... + 17587085.

Almost surely, 2^1266267564 is an apocalyptic number.

It is an amenable number.

1266267564 is an abundant number, since it is smaller than the sum of its proper divisors (1934575536).

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

1266267564 is a wasteful number, since it uses less digits than its factorization.

1266267564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35174109 (or 35174104 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 1266267564 is about 35584.6534899527. The cubic root of 1266267564 is about 1081.8702060487.

The spelling of 1266267564 in words is "one billion, two hundred sixty-six million, two hundred sixty-seven thousand, five hundred sixty-four".