2778833266 has 16 divisors (see below), whose sum is σ = 4555193760. Its totient is φ = 1260880480.

The previous prime is 2778833263. The next prime is 2778833269. The reversal of 2778833266 is 6623388772.

It is an interprime number because it is at equal distance from previous prime (2778833263) and next prime (2778833269).

It is not an unprimeable number, because it can be changed into a prime (2778833263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98476 + ... + 123511.

It is an arithmetic number, because the mean of its divisors is an integer number (284699610).

Almost surely, 2^2778833266 is an apocalyptic number.

2778833266 is a deficient number, since it is larger than the sum of its proper divisors (1776360494).

2778833266 is a wasteful number, since it uses less digits than its factorization.

2778833266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222569.

The product of its digits is 4064256, while the sum is 52.

The square root of 2778833266 is about 52714.6399589336. The cubic root of 2778833266 is about 1405.8991329388.

The spelling of 2778833266 in words is "two billion, seven hundred seventy-eight million, eight hundred thirty-three thousand, two hundred sixty-six".