66933836 has 24 divisors (see below), whose sum is σ = 122908800. Its totient is φ = 31852800.

The previous prime is 66933833. The next prime is 66933847. The reversal of 66933836 is 63833966.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66933833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3140 + ... + 11988.

It is an arithmetic number, because the mean of its divisors is an integer number (5121200).

Almost surely, 2^66933836 is an apocalyptic number.

It is an amenable number.

66933836 is a deficient number, since it is larger than the sum of its proper divisors (55974964).

66933836 is a wasteful number, since it uses less digits than its factorization.

66933836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8945 (or 8943 counting only the distinct ones).

The product of its digits is 419904, while the sum is 44.

The square root of 66933836 is about 8181.3101640263. The cubic root of 66933836 is about 406.0210703553.

The spelling of 66933836 in words is "sixty-six million, nine hundred thirty-three thousand, eight hundred thirty-six".