66504233 has 4 divisors (see below), whose sum is σ = 66641280. Its totient is φ = 66367188.

The previous prime is 66504227. The next prime is 66504239. The reversal of 66504233 is 33240566.

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 an interprime number because it is at equal distance from previous prime (66504227) and next prime (66504239).

It is a cyclic number.

It is not a de Polignac number, because 66504233 - 2⁶ = 66504169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66504196 and 66504205.

It is not an unprimeable number, because it can be changed into a prime (66504239) 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, 67793 + ... + 68766.

It is an arithmetic number, because the mean of its divisors is an integer number (16660320).

Almost surely, 2^66504233 is an apocalyptic number.

It is an amenable number.

66504233 is a deficient number, since it is larger than the sum of its proper divisors (137047).

66504233 is a wasteful number, since it uses less digits than its factorization.

66504233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137046.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 66504233 is about 8155.0127529024. The cubic root of 66504233 is about 405.1505470900.

Adding to 66504233 its reverse (33240566), we get a palindrome (99744799).

The spelling of 66504233 in words is "sixty-six million, five hundred four thousand, two hundred thirty-three".