66339885 has 16 divisors (see below), whose sum is σ = 106528320. Its totient is φ = 35253120.

The previous prime is 66339883. The next prime is 66339901. The reversal of 66339885 is 58893366.

66339885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66339885 - 2¹ = 66339883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66339881) 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 15 ways as a sum of consecutive naturals, for example, 3655 + ... + 12084.

It is an arithmetic number, because the mean of its divisors is an integer number (6658020).

Almost surely, 2^66339885 is an apocalyptic number.

It is an amenable number.

66339885 is a deficient number, since it is larger than the sum of its proper divisors (40188435).

66339885 is a wasteful number, since it uses less digits than its factorization.

66339885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16028.

The product of its digits is 933120, while the sum is 48.

The square root of 66339885 is about 8144.9300181156. The cubic root of 66339885 is about 404.8165302197.

The spelling of 66339885 in words is "sixty-six million, three hundred thirty-nine thousand, eight hundred eighty-five".