266906840 has 16 divisors (see below), whose sum is σ = 600540480. Its totient is φ = 106762720.

The previous prime is 266906837. The next prime is 266906873. The reversal of 266906840 is 48609662.

It is a super-2 number, since 2×266906840² = 142478522477571200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3336296 + ... + 3336375.

It is an arithmetic number, because the mean of its divisors is an integer number (37533780).

Almost surely, 2^266906840 is an apocalyptic number.

266906840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266906840 is an abundant number, since it is smaller than the sum of its proper divisors (333633640).

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

266906840 is a wasteful number, since it uses less digits than its factorization.

266906840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672682 (or 6672678 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 266906840 is about 16337.2837399612. The cubic root of 266906840 is about 643.8527690895.

The spelling of 266906840 in words is "two hundred sixty-six million, nine hundred six thousand, eight hundred forty".