266672838 has 16 divisors (see below), whose sum is σ = 547760880. Its totient is φ = 86488416.

The previous prime is 266672837. The next prime is 266672849. The reversal of 266672838 is 838276662.

It is a happy number.

It is a super-2 number, since 2×266672838² = 142228805053948488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266672831) 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, 600393 + ... + 600836.

It is an arithmetic number, because the mean of its divisors is an integer number (34235055).

Almost surely, 2^266672838 is an apocalyptic number.

266672838 is an abundant number, since it is smaller than the sum of its proper divisors (281088042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266672838 is a wasteful number, since it uses less digits than its factorization.

266672838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201271.

The product of its digits is 1161216, while the sum is 48.

The square root of 266672838 is about 16330.1205751825. The cubic root of 266672838 is about 643.6645549961.

The spelling of 266672838 in words is "two hundred sixty-six million, six hundred seventy-two thousand, eight hundred thirty-eight".