1266163465 has 16 divisors (see below), whose sum is σ = 1760243328. Its totient is φ = 856331136.

The previous prime is 1266163429. The next prime is 1266163471. The reversal of 1266163465 is 5643616621.

It is a cyclic number.

It is not a de Polignac number, because 1266163465 - 2²³ = 1257774857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245227 + ... + 250336.

It is an arithmetic number, because the mean of its divisors is an integer number (110015208).

Almost surely, 2^1266163465 is an apocalyptic number.

It is an amenable number.

1266163465 is a deficient number, since it is larger than the sum of its proper divisors (494079863).

1266163465 is an equidigital number, since it uses as much as digits as its factorization.

1266163465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495648.

The product of its digits is 155520, while the sum is 40.

The square root of 1266163465 is about 35583.1907647417. The cubic root of 1266163465 is about 1081.8405586303.

The spelling of 1266163465 in words is "one billion, two hundred sixty-six million, one hundred sixty-three thousand, four hundred sixty-five".