66335937139 has 2 divisors, whose sum is σ = 66335937140. Its totient is φ = 66335937138.

The previous prime is 66335937131. The next prime is 66335937181. The reversal of 66335937139 is 93173953366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66335937139 - 2³ = 66335937131 is a prime.

It is a super-2 number, since 2×66335937139² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66335937139.

It is not a weakly prime, because it can be changed into another prime (66335937131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33167968569 + 33167968570.

It is an arithmetic number, because the mean of its divisors is an integer number (33167968570).

Almost surely, 2^66335937139 is an apocalyptic number.

66335937139 is a deficient number, since it is larger than the sum of its proper divisors (1).

66335937139 is an equidigital number, since it uses as much as digits as its factorization.

66335937139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8266860, while the sum is 55.

The spelling of 66335937139 in words is "sixty-six billion, three hundred thirty-five million, nine hundred thirty-seven thousand, one hundred thirty-nine".