66240339 has 16 divisors (see below), whose sum is σ = 98592384. Its totient is φ = 39211200.

The previous prime is 66240283. The next prime is 66240353. The reversal of 66240339 is 93304266.

It is not a de Polignac number, because 66240339 - 2²⁵ = 32685907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (66240439) 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, 21922 + ... + 24759.

It is an arithmetic number, because the mean of its divisors is an integer number (6162024).

Almost surely, 2^66240339 is an apocalyptic number.

66240339 is a deficient number, since it is larger than the sum of its proper divisors (32352045).

66240339 is a wasteful number, since it uses less digits than its factorization.

66240339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46738.

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 66240339 is about 8138.8168059000. The cubic root of 66240339 is about 404.6139470156.

The spelling of 66240339 in words is "sixty-six million, two hundred forty thousand, three hundred thirty-nine".