66842933 has 4 divisors (see below), whose sum is σ = 67193088. Its totient is φ = 66492780.

The previous prime is 66842863. The next prime is 66842959. The reversal of 66842933 is 33924866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66842933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66842333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174791 + ... + 175172.

It is an arithmetic number, because the mean of its divisors is an integer number (16798272).

Almost surely, 2^66842933 is an apocalyptic number.

It is an amenable number.

66842933 is a deficient number, since it is larger than the sum of its proper divisors (350155).

66842933 is a wasteful number, since it uses less digits than its factorization.

66842933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350154.

The product of its digits is 186624, while the sum is 41.

The square root of 66842933 is about 8175.7527482184. The cubic root of 66842933 is about 405.8371810266.

The spelling of 66842933 in words is "sixty-six million, eight hundred forty-two thousand, nine hundred thirty-three".