61816266 has 12 divisors (see below), whose sum is σ = 133935282. Its totient is φ = 20605416.

The previous prime is 61816243. The next prime is 61816303. The reversal of 61816266 is 66261816.

61816266 is a `hidden beast` number, since 618 + 16 + 26 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 43283241 + 18533025 = 6579^2 + 4305^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61816266.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1717101 + ... + 1717136.

Almost surely, 2^61816266 is an apocalyptic number.

61816266 is an abundant number, since it is smaller than the sum of its proper divisors (72119016).

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

61816266 is a wasteful number, since it uses less digits than its factorization.

61816266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434245 (or 3434242 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 61816266 is about 7862.3320967764. The cubic root of 61816266 is about 395.3978067842.

The spelling of 61816266 in words is "sixty-one million, eight hundred sixteen thousand, two hundred sixty-six".