66324365 has 4 divisors (see below), whose sum is σ = 79589244. Its totient is φ = 53059488.

The previous prime is 66324343. The next prime is 66324367. The reversal of 66324365 is 56342366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56342366 = 2 ⋅28171183.

It can be written as a sum of positive squares in 2 ways, for example, as 20775364 + 45549001 = 4558^2 + 6749^2 .

It is a cyclic number.

It is not a de Polignac number, because 66324365 - 2⁶ = 66324301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66324367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6632432 + ... + 6632441.

It is an arithmetic number, because the mean of its divisors is an integer number (19897311).

Almost surely, 2^66324365 is an apocalyptic number.

It is an amenable number.

66324365 is a deficient number, since it is larger than the sum of its proper divisors (13264879).

66324365 is a wasteful number, since it uses less digits than its factorization.

66324365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13264878.

The product of its digits is 77760, while the sum is 35.

The square root of 66324365 is about 8143.9772224632. The cubic root of 66324365 is about 404.7849592547.

The spelling of 66324365 in words is "sixty-six million, three hundred twenty-four thousand, three hundred sixty-five".