266864334 has 64 divisors (see below), whose sum is σ = 619384320. Its totient is φ = 76018560.

The previous prime is 266864333. The next prime is 266864341. The reversal of 266864334 is 433468662.

It is a happy number.

It is a super-2 number, since 2×266864334² = 142433145522527112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266864333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 323847 + ... + 324669.

It is an arithmetic number, because the mean of its divisors is an integer number (9677880).

Almost surely, 2^266864334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266864334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309692160).

266864334 is an abundant number, since it is smaller than the sum of its proper divisors (352519986).

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

266864334 is a wasteful number, since it uses less digits than its factorization.

266864334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890 (or 856 counting only the distinct ones).

The product of its digits is 497664, while the sum is 42.

The square root of 266864334 is about 16335.9827987177. The cubic root of 266864334 is about 643.8185885508.

The spelling of 266864334 in words is "two hundred sixty-six million, eight hundred sixty-four thousand, three hundred thirty-four".