266764240 has 40 divisors (see below), whose sum is σ = 621344160. Its totient is φ = 106513536.

The previous prime is 266764229. The next prime is 266764247. The reversal of 266764240 is 42467662.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 266764240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266764247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46827 + ... + 52213.

It is an arithmetic number, because the mean of its divisors is an integer number (15533604).

Almost surely, 2^266764240 is an apocalyptic number.

266764240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266764240 is an abundant number, since it is smaller than the sum of its proper divisors (354579920).

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

266764240 is a wasteful number, since it uses less digits than its factorization.

266764240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6019 (or 6013 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 266764240 is about 16332.9189063070. The cubic root of 266764240 is about 643.7380851787.

The spelling of 266764240 in words is "two hundred sixty-six million, seven hundred sixty-four thousand, two hundred forty".