66365345 has 16 divisors (see below), whose sum is σ = 80730000. Its totient is φ = 52370688.

The previous prime is 66365339. The next prime is 66365353. The reversal of 66365345 is 54356366.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1852321 + 64513024 = 1361^2 + 8032^2 .

It is a cyclic number.

It is not a de Polignac number, because 66365345 - 2¹² = 66361249 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66365299 and 66365308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170411 + ... + 170799.

It is an arithmetic number, because the mean of its divisors is an integer number (5045625).

Almost surely, 2^66365345 is an apocalyptic number.

It is an amenable number.

66365345 is a deficient number, since it is larger than the sum of its proper divisors (14364655).

66365345 is a wasteful number, since it uses less digits than its factorization.

66365345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772.

The product of its digits is 194400, while the sum is 38.

The square root of 66365345 is about 8146.4928036548. The cubic root of 66365345 is about 404.8683105860.

The spelling of 66365345 in words is "sixty-six million, three hundred sixty-five thousand, three hundred forty-five".