66413030677639 has 2 divisors, whose sum is σ = 66413030677640. Its totient is φ = 66413030677638.

The previous prime is 66413030677633. The next prime is 66413030677649. The reversal of 66413030677639 is 93677603031466.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66413030677639 - 2²⁹ = 66412493806727 is a prime.

It is a super-2 number, since 2×66413030677639² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66413030677633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33206515338819 + 33206515338820.

It is an arithmetic number, because the mean of its divisors is an integer number (33206515338820).

Almost surely, 2^{66413030677639} is an apocalyptic number.

66413030677639 is a deficient number, since it is larger than the sum of its proper divisors (1).

66413030677639 is an equidigital number, since it uses as much as digits as its factorization.

66413030677639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61725888, while the sum is 61.

The spelling of 66413030677639 in words is "sixty-six trillion, four hundred thirteen billion, thirty million, six hundred seventy-seven thousand, six hundred thirty-nine".