266421000 has 64 divisors (see below), whose sum is σ = 831242880. Its totient is φ = 71044800.

The previous prime is 266420971. The next prime is 266421041. The reversal of 266421000 is 124662.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41404 + ... + 47403.

It is an arithmetic number, because the mean of its divisors is an integer number (12988170).

Almost surely, 2^266421000 is an apocalyptic number.

266421000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266421000 is an abundant number, since it is smaller than the sum of its proper divisors (564821880).

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

266421000 is a wasteful number, since it uses less digits than its factorization.

266421000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88831 (or 88817 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 266421000 is about 16322.4079105995. The cubic root of 266421000 is about 643.4618718764.

Adding to 266421000 its reverse (124662), we get a palindrome (266545662).

The spelling of 266421000 in words is "two hundred sixty-six million, four hundred twenty-one thousand".