66365305 has 8 divisors (see below), whose sum is σ = 79724232. Its totient is φ = 53035008.

The previous prime is 66365303. The next prime is 66365323. The reversal of 66365305 is 50356366.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12475024 + 53890281 = 3532^2 + 7341^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66365305 - 2¹ = 66365303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66365303) 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, 1672 + ... + 11641.

It is an arithmetic number, because the mean of its divisors is an integer number (9965529).

Almost surely, 2^66365305 is an apocalyptic number.

It is an amenable number.

66365305 is a deficient number, since it is larger than the sum of its proper divisors (13358927).

66365305 is a wasteful number, since it uses less digits than its factorization.

66365305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14315.

The product of its (nonzero) digits is 48600, while the sum is 34.

The square root of 66365305 is about 8146.4903486103. The cubic root of 66365305 is about 404.8682292447.

The spelling of 66365305 in words is "sixty-six million, three hundred sixty-five thousand, three hundred five".