66933965 has 16 divisors (see below), whose sum is σ = 93529728. Its totient is φ = 45030336.

The previous prime is 66933961. The next prime is 66933983. The reversal of 66933965 is 56933966.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66933965 - 2² = 66933961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66933961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16187 + ... + 19896.

It is an arithmetic number, because the mean of its divisors is an integer number (5845608).

Almost surely, 2^66933965 is an apocalyptic number.

It is an amenable number.

66933965 is a deficient number, since it is larger than the sum of its proper divisors (26595763).

66933965 is a wasteful number, since it uses less digits than its factorization.

66933965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36148.

The product of its digits is 787320, while the sum is 47.

The square root of 66933965 is about 8181.3180478453. The cubic root of 66933965 is about 406.0213311934.

Subtracting from 66933965 its reverse (56933966), we obtain a palindrome (9999999).

The spelling of 66933965 in words is "sixty-six million, nine hundred thirty-three thousand, nine hundred sixty-five".