266378793 has 16 divisors (see below), whose sum is σ = 358120896. Its totient is φ = 176117760.

The previous prime is 266378771. The next prime is 266378821. The reversal of 266378793 is 397873662.

It is a de Polignac number, because none of the positive numbers 2^k-266378793 is a prime.

It is a super-2 number, since 2×266378793² = 141915322720273698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266378293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283821 + ... + 284757.

It is an arithmetic number, because the mean of its divisors is an integer number (22382556).

Almost surely, 2^266378793 is an apocalyptic number.

It is an amenable number.

266378793 is a deficient number, since it is larger than the sum of its proper divisors (91742103).

266378793 is a wasteful number, since it uses less digits than its factorization.

266378793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624.

The product of its digits is 2286144, while the sum is 51.

The square root of 266378793 is about 16321.1149435325. The cubic root of 266378793 is about 643.4278905342.

The spelling of 266378793 in words is "two hundred sixty-six million, three hundred seventy-eight thousand, seven hundred ninety-three".