266094640 has 40 divisors (see below), whose sum is σ = 707052960. Its totient is φ = 91232256.

The previous prime is 266094623. The next prime is 266094643. The reversal of 266094640 is 46490662.

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 266094640.

It is not an unprimeable number, because it can be changed into a prime (266094643) 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, 237025 + ... + 238144.

It is an arithmetic number, because the mean of its divisors is an integer number (17676324).

Almost surely, 2^266094640 is an apocalyptic number.

266094640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266094640 is an abundant number, since it is smaller than the sum of its proper divisors (440958320).

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

266094640 is a wasteful number, since it uses less digits than its factorization.

266094640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475189 (or 475183 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 266094640 is about 16312.4075476307. The cubic root of 266094640 is about 643.1990221968.

The spelling of 266094640 in words is "two hundred sixty-six million, ninety-four thousand, six hundred forty".