1266933361 has 4 divisors (see below), whose sum is σ = 1268126272. Its totient is φ = 1265740452.

The previous prime is 1266933341. The next prime is 1266933383. The reversal of 1266933361 is 1633396621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1633396621 = 7577 ⋅215573.

It is a cyclic number.

It is not a de Polignac number, because 1266933361 - 2⁵ = 1266933329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266933341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594861 + ... + 596986.

It is an arithmetic number, because the mean of its divisors is an integer number (317031568).

Almost surely, 2^1266933361 is an apocalyptic number.

It is an amenable number.

1266933361 is a deficient number, since it is larger than the sum of its proper divisors (1192911).

1266933361 is a wasteful number, since it uses less digits than its factorization.

1266933361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192910.

The product of its digits is 104976, while the sum is 40.

The square root of 1266933361 is about 35594.0073748377. The cubic root of 1266933361 is about 1082.0597867636.

The spelling of 1266933361 in words is "one billion, two hundred sixty-six million, nine hundred thirty-three thousand, three hundred sixty-one".