66360145 has 4 divisors (see below), whose sum is σ = 79632180. Its totient is φ = 53088112.

The previous prime is 66360143. The next prime is 66360157. The reversal of 66360145 is 54106366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20757136 + 45603009 = 4556^2 + 6753^2 .

It is a cyclic number.

It is not a de Polignac number, because 66360145 - 2¹ = 66360143 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66360143) 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, 6636010 + ... + 6636019.

It is an arithmetic number, because the mean of its divisors is an integer number (19908045).

Almost surely, 2^66360145 is an apocalyptic number.

It is an amenable number.

66360145 is a deficient number, since it is larger than the sum of its proper divisors (13272035).

66360145 is a wasteful number, since it uses less digits than its factorization.

66360145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13272034.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 66360145 is about 8146.1736416553. The cubic root of 66360145 is about 404.8577359395.

The spelling of 66360145 in words is "sixty-six million, three hundred sixty thousand, one hundred forty-five".