266642208 has 72 divisors (see below), whose sum is σ = 866593728. Its totient is φ = 76182912.

The previous prime is 266642179. The next prime is 266642221. The reversal of 266642208 is 802246662.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64116 + ... + 68147.

It is an arithmetic number, because the mean of its divisors is an integer number (12036024).

Almost surely, 2^266642208 is an apocalyptic number.

266642208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

266642208 is an abundant number, since it is smaller than the sum of its proper divisors (599951520).

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

266642208 is a wasteful number, since it uses less digits than its factorization.

266642208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132286 (or 132275 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 266642208 is about 16329.1827107176. The cubic root of 266642208 is about 643.6399103162.

The spelling of 266642208 in words is "two hundred sixty-six million, six hundred forty-two thousand, two hundred eight".