266980880 has 20 divisors (see below), whose sum is σ = 620730732. Its totient is φ = 106792320.

The previous prime is 266980867. The next prime is 266980891. The reversal of 266980880 is 88089662.

It can be written as a sum of positive squares in 2 ways, for example, as 178169104 + 88811776 = 13348^2 + 9424^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 1668551 + ... + 1668710.

Almost surely, 2^266980880 is an apocalyptic number.

266980880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266980880 is an abundant number, since it is smaller than the sum of its proper divisors (353749852).

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

266980880 is a wasteful number, since it uses less digits than its factorization.

266980880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3337274 (or 3337268 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 266980880 is about 16339.5495653950. The cubic root of 266980880 is about 643.9122985390.

The spelling of 266980880 in words is "two hundred sixty-six million, nine hundred eighty thousand, eight hundred eighty".