266740394 has 16 divisors (see below), whose sum is σ = 409629960. Its totient is φ = 130233600.

The previous prime is 266740381. The next prime is 266740403. The reversal of 266740394 is 493047662.

It can be written as a sum of positive squares in 4 ways, for example, as 258405625 + 8334769 = 16075^2 + 2887^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5702 + ... + 23790.

Almost surely, 2^266740394 is an apocalyptic number.

266740394 is a deficient number, since it is larger than the sum of its proper divisors (142889566).

266740394 is a wasteful number, since it uses less digits than its factorization.

266740394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18265.

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 266740394 is about 16332.1888918785. The cubic root of 266740394 is about 643.7189034025.

The spelling of 266740394 in words is "two hundred sixty-six million, seven hundred forty thousand, three hundred ninety-four".