66338938 has 16 divisors (see below), whose sum is σ = 102057120. Its totient is φ = 32323536.

The previous prime is 66338929. The next prime is 66338941. The reversal of 66338938 is 83983366.

66338938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 64593 + ... + 65611.

It is an arithmetic number, because the mean of its divisors is an integer number (6378570).

Almost surely, 2^66338938 is an apocalyptic number.

66338938 is a deficient number, since it is larger than the sum of its proper divisors (35718182).

66338938 is a wasteful number, since it uses less digits than its factorization.

66338938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821.

The product of its digits is 559872, while the sum is 46.

The square root of 66338938 is about 8144.8718835842. The cubic root of 66338938 is about 404.8146039623.

It can be divided in two parts, 66338 and 938, that added together give a palindrome (67276).

The spelling of 66338938 in words is "sixty-six million, three hundred thirty-eight thousand, nine hundred thirty-eight".