266318740 has 12 divisors (see below), whose sum is σ = 559269396. Its totient is φ = 106527488.

The previous prime is 266318653. The next prime is 266318747. The reversal of 266318740 is 47813662.

It can be written as a sum of positive squares in 2 ways, for example, as 99082116 + 167236624 = 9954^2 + 12932^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 266318740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266318747) 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 3 ways as a sum of consecutive naturals, for example, 6657949 + ... + 6657988.

It is an arithmetic number, because the mean of its divisors is an integer number (46605783).

Almost surely, 2^266318740 is an apocalyptic number.

266318740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266318740 is an abundant number, since it is smaller than the sum of its proper divisors (292950656).

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

266318740 is a wasteful number, since it uses less digits than its factorization.

266318740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13315946 (or 13315944 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 266318740 is about 16319.2751064500. The cubic root of 266318740 is about 643.3795349842.

The spelling of 266318740 in words is "two hundred sixty-six million, three hundred eighteen thousand, seven hundred forty".