266816404 has 6 divisors (see below), whose sum is σ = 466928714. Its totient is φ = 133408200.

The previous prime is 266816383. The next prime is 266816423. The reversal of 266816404 is 404618662.

It can be written as a sum of positive squares in only one way, i.e., 236544400 + 30272004 = 15380^2 + 5502^2 .

It is a super-3 number, since 3×266816404³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33352047 + ... + 33352054.

Almost surely, 2^266816404 is an apocalyptic number.

It is an amenable number.

266816404 is a deficient number, since it is larger than the sum of its proper divisors (200112310).

266816404 is a wasteful number, since it uses less digits than its factorization.

266816404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66704105 (or 66704103 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 266816404 is about 16334.5157259100. The cubic root of 266816404 is about 643.7800420328.

The spelling of 266816404 in words is "two hundred sixty-six million, eight hundred sixteen thousand, four hundred four".