1266113544660 has 72 divisors (see below), whose sum is σ = 3866319966600. Its totient is φ = 335364296448.

The previous prime is 1266113544629. The next prime is 1266113544691. The reversal of 1266113544660 is 664453116621.

1266113544660 is a `hidden beast` number, since 1 + 26 + 6 + 113 + 54 + 466 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1266113544629) and next prime (1266113544691).

It can be written as a sum of positive squares in 4 ways, for example, as 58044373776 + 1208069170884 = 240924^2 + 1099122^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23577087 + ... + 23630726.

It is an arithmetic number, because the mean of its divisors is an integer number (53698888425).

Almost surely, 2^{1266113544660} is an apocalyptic number.

1266113544660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266113544660 is an abundant number, since it is smaller than the sum of its proper divisors (2600206421940).

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

1266113544660 is a wasteful number, since it uses less digits than its factorization.

1266113544660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47207977 (or 47207972 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 1266113544660 in words is "one trillion, two hundred sixty-six billion, one hundred thirteen million, five hundred forty-four thousand, six hundred sixty".