1266142660273 has 4 divisors (see below), whose sum is σ = 1273461404148. Its totient is φ = 1258823916400.

The previous prime is 1266142660253. The next prime is 1266142660283. The reversal of 1266142660273 is 3720662416621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 566539225344 + 699603434929 = 752688^2 + 836423^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1266142660273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266142660253) 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, 3659371678 + ... + 3659372023.

It is an arithmetic number, because the mean of its divisors is an integer number (318365351037).

Almost surely, 2^{1266142660273} is an apocalyptic number.

It is an amenable number.

1266142660273 is a deficient number, since it is larger than the sum of its proper divisors (7318743875).

1266142660273 is an equidigital number, since it uses as much as digits as its factorization.

1266142660273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7318743874.

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 1266142660273 in words is "one trillion, two hundred sixty-six billion, one hundred forty-two million, six hundred sixty thousand, two hundred seventy-three".