66933844 has 6 divisors (see below), whose sum is σ = 117134234. Its totient is φ = 33466920.

The previous prime is 66933833. The next prime is 66933847. The reversal of 66933844 is 44833966.

It can be written as a sum of positive squares in only one way, i.e., 56821444 + 10112400 = 7538^2 + 3180^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66933844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66933847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8366727 + ... + 8366734.

Almost surely, 2^66933844 is an apocalyptic number.

It is an amenable number.

66933844 is a deficient number, since it is larger than the sum of its proper divisors (50200390).

66933844 is a wasteful number, since it uses less digits than its factorization.

66933844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16733465 (or 16733463 counting only the distinct ones).

The product of its digits is 373248, while the sum is 43.

The square root of 66933844 is about 8181.3106529455. The cubic root of 66933844 is about 406.0210865313.

The spelling of 66933844 in words is "sixty-six million, nine hundred thirty-three thousand, eight hundred forty-four".