266455220 has 24 divisors (see below), whose sum is σ = 571463424. Its totient is φ = 104314016.

The previous prime is 266455201. The next prime is 266455237. The reversal of 266455220 is 22554662.

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, 140792 + ... + 142671.

It is an arithmetic number, because the mean of its divisors is an integer number (23810976).

Almost surely, 2^266455220 is an apocalyptic number.

266455220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266455220 is an abundant number, since it is smaller than the sum of its proper divisors (305008204).

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

266455220 is a wasteful number, since it uses less digits than its factorization.

266455220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283519 (or 283517 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 266455220 is about 16323.4561291413. The cubic root of 266455220 is about 643.4894201585.

The spelling of 266455220 in words is "two hundred sixty-six million, four hundred fifty-five thousand, two hundred twenty".