1266351160051 has 4 divisors (see below), whose sum is σ = 1307201197504. Its totient is φ = 1225501122600.

The previous prime is 1266351160043. The next prime is 1266351160091. The reversal of 1266351160051 is 1500611536621.

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

It is a cyclic number.

It is not a de Polignac number, because 1266351160051 - 2³ = 1266351160043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266351160031) 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, 20425018680 + ... + 20425018741.

It is an arithmetic number, because the mean of its divisors is an integer number (326800299376).

Almost surely, 2^{1266351160051} is an apocalyptic number.

1266351160051 is a deficient number, since it is larger than the sum of its proper divisors (40850037453).

1266351160051 is an equidigital number, since it uses as much as digits as its factorization.

1266351160051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40850037452.

The product of its (nonzero) digits is 32400, while the sum is 37.

Adding to 1266351160051 its reverse (1500611536621), we get a palindrome (2766962696672).

The spelling of 1266351160051 in words is "one trillion, two hundred sixty-six billion, three hundred fifty-one million, one hundred sixty thousand, fifty-one".