266808020 has 24 divisors (see below), whose sum is σ = 565441800. Its totient is φ = 105743232.

The previous prime is 266808001. The next prime is 266808037. The reversal of 266808020 is 20808662.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 97495876 + 169312144 = 9874^2 + 13012^2 .

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 in 7 ways as a sum of consecutive naturals, for example, 59015 + ... + 63374.

It is an arithmetic number, because the mean of its divisors is an integer number (23560075).

Almost surely, 2^266808020 is an apocalyptic number.

266808020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266808020 is an abundant number, since it is smaller than the sum of its proper divisors (298633780).

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

266808020 is a wasteful number, since it uses less digits than its factorization.

266808020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122507 (or 122505 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 266808020 is about 16334.2590894108. The cubic root of 266808020 is about 643.7732989337.

The spelling of 266808020 in words is "two hundred sixty-six million, eight hundred eight thousand, twenty".