266021460 has 36 divisors (see below), whose sum is σ = 806932308. Its totient is φ = 70939008.

The previous prime is 266021449. The next prime is 266021461. The reversal of 266021460 is 64120662.

It is a happy number.

266021460 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 103917636 + 162103824 = 10194^2 + 12732^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266021461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 738769 + ... + 739128.

Almost surely, 2^266021460 is an apocalyptic number.

266021460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266021460 is an abundant number, since it is smaller than the sum of its proper divisors (540910848).

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

266021460 is a wasteful number, since it uses less digits than its factorization.

266021460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477912 (or 1477907 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 266021460 is about 16310.1643155426. The cubic root of 266021460 is about 643.1400536784.

The spelling of 266021460 in words is "two hundred sixty-six million, twenty-one thousand, four hundred sixty".