266768646 has 16 divisors (see below), whose sum is σ = 545945664. Its totient is φ = 86854824.

The previous prime is 266768633. The next prime is 266768657. The reversal of 266768646 is 646867662.

It is a happy number.

266768646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516736 + ... + 517251.

It is an arithmetic number, because the mean of its divisors is an integer number (34121604).

Almost surely, 2^266768646 is an apocalyptic number.

266768646 is an abundant number, since it is smaller than the sum of its proper divisors (279177018).

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

266768646 is a wasteful number, since it uses less digits than its factorization.

266768646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034035.

The product of its digits is 3483648, while the sum is 51.

The square root of 266768646 is about 16333.0537867234. The cubic root of 266768646 is about 643.7416292499.

The spelling of 266768646 in words is "two hundred sixty-six million, seven hundred sixty-eight thousand, six hundred forty-six".