266056406 has 16 divisors (see below), whose sum is σ = 497560320. Its totient is φ = 103658280.

The previous prime is 266056391. The next prime is 266056447. The reversal of 266056406 is 604650662.

It is a super-2 number, since 2×266056406² = 141572022347273672, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 863666 + ... + 863973.

It is an arithmetic number, because the mean of its divisors is an integer number (31097520).

Almost surely, 2^266056406 is an apocalyptic number.

266056406 is a deficient number, since it is larger than the sum of its proper divisors (231503914).

266056406 is a wasteful number, since it uses less digits than its factorization.

266056406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727659.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 266056406 is about 16311.2355755167. The cubic root of 266056406 is about 643.1682145496.

The spelling of 266056406 in words is "two hundred sixty-six million, fifty-six thousand, four hundred six".