66365145 has 96 divisors (see below), whose sum is σ = 145566720. Its totient is φ = 27169920.

The previous prime is 66365113. The next prime is 66365149. The reversal of 66365145 is 54156366.

66365145 is a `hidden beast` number, since 6 + 636 + 5 + 14 + 5 = 666.

It is not a de Polignac number, because 66365145 - 2⁵ = 66365113 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66365149) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 370666 + ... + 370844.

It is an arithmetic number, because the mean of its divisors is an integer number (1516320).

Almost surely, 2^66365145 is an apocalyptic number.

It is an amenable number.

66365145 is an abundant number, since it is smaller than the sum of its proper divisors (79201575).

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

66365145 is a wasteful number, since it uses less digits than its factorization.

66365145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 312 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 66365145 is about 8146.4805284245. The cubic root of 66365145 is about 404.8679038791.

It can be divided in two parts, 6636 and 5145, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 66365145 in words is "sixty-six million, three hundred sixty-five thousand, one hundred forty-five".