66325139 has 4 divisors (see below), whose sum is σ = 66356640. Its totient is φ = 66293640.

The previous prime is 66325111. The next prime is 66325141. The reversal of 66325139 is 93152366.

66325139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93152366 = 2 ⋅46576183.

It is a cyclic number.

It is not a de Polignac number, because 66325139 - 2¹² = 66321043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66325099 and 66325108.

It is not an unprimeable number, because it can be changed into a prime (66325159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12347 + ... + 16884.

It is an arithmetic number, because the mean of its divisors is an integer number (16589160).

Almost surely, 2^66325139 is an apocalyptic number.

66325139 is a deficient number, since it is larger than the sum of its proper divisors (31501).

66325139 is a wasteful number, since it uses less digits than its factorization.

66325139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31500.

The product of its digits is 29160, while the sum is 35.

The square root of 66325139 is about 8144.0247421039. The cubic root of 66325139 is about 404.7865338513.

The spelling of 66325139 in words is "sixty-six million, three hundred twenty-five thousand, one hundred thirty-nine".