266243396 has 6 divisors (see below), whose sum is σ = 465925950. Its totient is φ = 133121696.

The previous prime is 266243389. The next prime is 266243413. The reversal of 266243396 is 693342662.

It can be written as a sum of positive squares in only one way, i.e., 152522500 + 113720896 = 12350^2 + 10664^2 .

It is a super-2 number, since 2×266243396² = 141771091827225632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33280421 + ... + 33280428.

It is an arithmetic number, because the mean of its divisors is an integer number (77654325).

Almost surely, 2^266243396 is an apocalyptic number.

It is an amenable number.

266243396 is a deficient number, since it is larger than the sum of its proper divisors (199682554).

266243396 is a wasteful number, since it uses less digits than its factorization.

266243396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66560853 (or 66560851 counting only the distinct ones).

The product of its digits is 279936, while the sum is 41.

The square root of 266243396 is about 16316.9665072893. The cubic root of 266243396 is about 643.3188566160.

The spelling of 266243396 in words is "two hundred sixty-six million, two hundred forty-three thousand, three hundred ninety-six".