66678579343 has 2 divisors, whose sum is σ = 66678579344. Its totient is φ = 66678579342.

The previous prime is 66678579313. The next prime is 66678579389. The reversal of 66678579343 is 34397587666.

66678579343 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66678579343 - 2⁵ = 66678579311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66678579313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33339289671 + 33339289672.

It is an arithmetic number, because the mean of its divisors is an integer number (33339289672).

Almost surely, 2^66678579343 is an apocalyptic number.

66678579343 is a deficient number, since it is larger than the sum of its proper divisors (1).

66678579343 is an equidigital number, since it uses as much as digits as its factorization.

66678579343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 137168640, while the sum is 64.

The spelling of 66678579343 in words is "sixty-six billion, six hundred seventy-eight million, five hundred seventy-nine thousand, three hundred forty-three".