1266177271993 has 4 divisors (see below), whose sum is σ = 1266200665488. Its totient is φ = 1266153878500.

The previous prime is 1266177271981. The next prime is 1266177272021. The reversal of 1266177271993 is 3991727716621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1266177271993 is a prime.

It is a super-2 number, since 2×1266177271993² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266177271903) 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, 11615371 + ... + 11723872.

It is an arithmetic number, because the mean of its divisors is an integer number (316550166372).

Almost surely, 2^{1266177271993} is an apocalyptic number.

It is an amenable number.

1266177271993 is a deficient number, since it is larger than the sum of its proper divisors (23393495).

1266177271993 is an equidigital number, since it uses as much as digits as its factorization.

1266177271993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23393494.

The product of its digits is 12002256, while the sum is 61.

The spelling of 1266177271993 in words is "one trillion, two hundred sixty-six billion, one hundred seventy-seven million, two hundred seventy-one thousand, nine hundred ninety-three".