266816400 has 60 divisors (see below), whose sum is σ = 854705712. Its totient is φ = 71150720.

The previous prime is 266816383. The next prime is 266816423. The reversal of 266816400 is 4618662.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (60).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109974 + ... + 112373.

Almost surely, 2^266816400 is an apocalyptic number.

266816400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266816400 is an abundant number, since it is smaller than the sum of its proper divisors (587889312).

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

266816400 is a wasteful number, since it uses less digits than its factorization.

266816400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222368 (or 222357 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 266816400 is about 16334.5156034699. The cubic root of 266816400 is about 643.7800388157.

The spelling of 266816400 in words is "two hundred sixty-six million, eight hundred sixteen thousand, four hundred".