266401404 has 36 divisors (see below), whose sum is σ = 677181960. Its totient is φ = 88302240.

The previous prime is 266401397. The next prime is 266401417. The reversal of 266401404 is 404104662.

266401404 is a `hidden beast` number, since 2 + 6 + 640 + 14 + 0 + 4 = 666.

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

It is a congruent number.

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, 14227 + ... + 27114.

It is an arithmetic number, because the mean of its divisors is an integer number (18810610).

Almost surely, 2^266401404 is an apocalyptic number.

It is an amenable number.

266401404 is an abundant number, since it is smaller than the sum of its proper divisors (410780556).

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

266401404 is a wasteful number, since it uses less digits than its factorization.

266401404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41530 (or 41525 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 266401404 is about 16321.8076204813. The cubic root of 266401404 is about 643.4460953573.

The spelling of 266401404 in words is "two hundred sixty-six million, four hundred one thousand, four hundred four".