66366405233 has 4 divisors (see below), whose sum is σ = 66368464500. Its totient is φ = 66364345968.

The previous prime is 66366405229. The next prime is 66366405269. The reversal of 66366405233 is 33250466366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9680985664 + 56685419569 = 98392^2 + 238087^2 .

It is a cyclic number.

It is not a de Polignac number, because 66366405233 - 2² = 66366405229 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66366405223) 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, 980510 + ... + 1046007.

It is an arithmetic number, because the mean of its divisors is an integer number (16592116125).

Almost surely, 2^66366405233 is an apocalyptic number.

It is an amenable number.

66366405233 is a deficient number, since it is larger than the sum of its proper divisors (2059267).

66366405233 is a wasteful number, since it uses less digits than its factorization.

66366405233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059266.

The product of its (nonzero) digits is 1399680, while the sum is 44.

The spelling of 66366405233 in words is "sixty-six billion, three hundred sixty-six million, four hundred five thousand, two hundred thirty-three".