266640748 has 48 divisors (see below), whose sum is σ = 534594816. Its totient is φ = 115184960.

The previous prime is 266640743. The next prime is 266640757. The reversal of 266640748 is 847046662.

It is not an unprimeable number, because it can be changed into a prime (266640743) 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 15 ways as a sum of consecutive naturals, for example, 174315 + ... + 175837.

It is an arithmetic number, because the mean of its divisors is an integer number (11137392).

Almost surely, 2^266640748 is an apocalyptic number.

It is an amenable number.

266640748 is an abundant number, since it is smaller than the sum of its proper divisors (267954068).

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

266640748 is a wasteful number, since it uses less digits than its factorization.

266640748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734 (or 1732 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The square root of 266640748 is about 16329.1380054184. The cubic root of 266640748 is about 643.6387355635.

The spelling of 266640748 in words is "two hundred sixty-six million, six hundred forty thousand, seven hundred forty-eight".