266020280 has 16 divisors (see below), whose sum is σ = 598545720. Its totient is φ = 106408096.

The previous prime is 266020253. The next prime is 266020291. The reversal of 266020280 is 82020662.

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 3 ways as a sum of consecutive naturals, for example, 3325214 + ... + 3325293.

Almost surely, 2^266020280 is an apocalyptic number.

266020280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266020280 is an abundant number, since it is smaller than the sum of its proper divisors (332525440).

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

266020280 is a wasteful number, since it uses less digits than its factorization.

266020280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6650518 (or 6650514 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 266020280 is about 16310.1281417406. The cubic root of 266020280 is about 643.1391027446.

The spelling of 266020280 in words is "two hundred sixty-six million, twenty thousand, two hundred eighty".