66345365 has 8 divisors (see below), whose sum is σ = 79700280. Its totient is φ = 53019072.

The previous prime is 66345361. The next prime is 66345371. The reversal of 66345365 is 56354366.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1976836 + 64368529 = 1406^2 + 8023^2 .

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 66345365 - 2² = 66345361 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66345361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1670 + ... + 11639.

It is an arithmetic number, because the mean of its divisors is an integer number (9962535).

Almost surely, 2^66345365 is an apocalyptic number.

It is an amenable number.

66345365 is a deficient number, since it is larger than the sum of its proper divisors (13354915).

66345365 is a wasteful number, since it uses less digits than its factorization.

66345365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14311.

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

The square root of 66345365 is about 8145.2664167601. The cubic root of 66345365 is about 404.8276765234.

Subtracting from 66345365 its reverse (56354366), we obtain a palindrome (9990999).

The spelling of 66345365 in words is "sixty-six million, three hundred forty-five thousand, three hundred sixty-five".