266705740 has 24 divisors (see below), whose sum is σ = 640094112. Its totient is φ = 91441920.

The previous prime is 266705729. The next prime is 266705743. The reversal of 266705740 is 47507662.

It is a super-2 number, since 2×266705740² = 142263903497895200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266705740.

It is not an unprimeable number, because it can be changed into a prime (266705743) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 952381 + ... + 952660.

It is an arithmetic number, because the mean of its divisors is an integer number (26670588).

Almost surely, 2^266705740 is an apocalyptic number.

266705740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266705740 is an abundant number, since it is smaller than the sum of its proper divisors (373388372).

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

266705740 is a wasteful number, since it uses less digits than its factorization.

266705740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905057 (or 1905055 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 266705740 is about 16331.1279463483. The cubic root of 266705740 is about 643.6910256089.

The spelling of 266705740 in words is "two hundred sixty-six million, seven hundred five thousand, seven hundred forty".