266870020 has 24 divisors (see below), whose sum is σ = 563530968. Its totient is φ = 106156800.

The previous prime is 266870003. The next prime is 266870027. The reversal of 266870020 is 20078662.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5982916 + 260887104 = 2446^2 + 16152^2 .

It is not an unprimeable number, because it can be changed into a prime (266870027) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 33241 + ... + 40480.

It is an arithmetic number, because the mean of its divisors is an integer number (23480457).

Almost surely, 2^266870020 is an apocalyptic number.

266870020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266870020 is an abundant number, since it is smaller than the sum of its proper divisors (296660948).

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

266870020 is a wasteful number, since it uses less digits than its factorization.

266870020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73911 (or 73909 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 266870020 is about 16336.1568307849. The cubic root of 266870020 is about 643.8231610695.

The spelling of 266870020 in words is "two hundred sixty-six million, eight hundred seventy thousand, twenty".