66426135839 has 8 divisors (see below), whose sum is σ = 75963919488. Its totient is φ = 56900436120.

The previous prime is 66426135817. The next prime is 66426135857. The reversal of 66426135839 is 93853162466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66426135839 - 2¹⁶ = 66426070303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66426131839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3009197 + ... + 3031190.

It is an arithmetic number, because the mean of its divisors is an integer number (9495489936).

Almost surely, 2^66426135839 is an apocalyptic number.

66426135839 is a deficient number, since it is larger than the sum of its proper divisors (9537783649).

66426135839 is a wasteful number, since it uses less digits than its factorization.

66426135839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6041965.

The product of its digits is 5598720, while the sum is 53.

The spelling of 66426135839 in words is "sixty-six billion, four hundred twenty-six million, one hundred thirty-five thousand, eight hundred thirty-nine".