66432642013 has 2 divisors, whose sum is σ = 66432642014. Its totient is φ = 66432642012.

The previous prime is 66432641987. The next prime is 66432642037. The reversal of 66432642013 is 31024623466.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61715974329 + 4716667684 = 248427^2 + 68678^2 .

It is a cyclic number.

It is not a de Polignac number, because 66432642013 - 2²¹ = 66430544861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66432642053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33216321006 + 33216321007.

It is an arithmetic number, because the mean of its divisors is an integer number (33216321007).

Almost surely, 2^66432642013 is an apocalyptic number.

It is an amenable number.

66432642013 is a deficient number, since it is larger than the sum of its proper divisors (1).

66432642013 is an equidigital number, since it uses as much as digits as its factorization.

66432642013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 37.

The spelling of 66432642013 in words is "sixty-six billion, four hundred thirty-two million, six hundred forty-two thousand, thirteen".