266889340 has 12 divisors (see below), whose sum is σ = 560467656. Its totient is φ = 106755728.

The previous prime is 266889331. The next prime is 266889353. The reversal of 266889340 is 43988662.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6672214 + ... + 6672253.

It is an arithmetic number, because the mean of its divisors is an integer number (46705638).

Almost surely, 2^266889340 is an apocalyptic number.

266889340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266889340 is an abundant number, since it is smaller than the sum of its proper divisors (293578316).

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

266889340 is a wasteful number, since it uses less digits than its factorization.

266889340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13344476 (or 13344474 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 266889340 is about 16336.7481464335. The cubic root of 266889340 is about 643.8386971762.

The spelling of 266889340 in words is "two hundred sixty-six million, eight hundred eighty-nine thousand, three hundred forty".