66331245 has 16 divisors (see below), whose sum is σ = 107183232. Its totient is φ = 35025600.

The previous prime is 66331183. The next prime is 66331247. The reversal of 66331245 is 54213366.

It is not a de Polignac number, because 66331245 - 2¹⁴ = 66314861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66331247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20377 + ... + 23406.

It is an arithmetic number, because the mean of its divisors is an integer number (6698952).

Almost surely, 2^66331245 is an apocalyptic number.

It is an amenable number.

66331245 is a deficient number, since it is larger than the sum of its proper divisors (40851987).

66331245 is a wasteful number, since it uses less digits than its factorization.

66331245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43892.

The product of its digits is 12960, while the sum is 30.

The square root of 66331245 is about 8144.3996095477. The cubic root of 66331245 is about 404.7989552386.

The spelling of 66331245 in words is "sixty-six million, three hundred thirty-one thousand, two hundred forty-five".