66133768539 has 16 divisors (see below), whose sum is σ = 89234192160. Its totient is φ = 43561985280.

The previous prime is 66133768537. The next prime is 66133768541. The reversal of 66133768539 is 93586733166.

It is an interprime number because it is at equal distance from previous prime (66133768537) and next prime (66133768541).

It is not a de Polignac number, because 66133768539 - 2¹ = 66133768537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66133768537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279049 + ... + 458405.

It is an arithmetic number, because the mean of its divisors is an integer number (5577137010).

Almost surely, 2^66133768539 is an apocalyptic number.

66133768539 is a deficient number, since it is larger than the sum of its proper divisors (23100423621).

66133768539 is a wasteful number, since it uses less digits than its factorization.

66133768539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180830.

The product of its digits is 14696640, while the sum is 57.

The spelling of 66133768539 in words is "sixty-six billion, one hundred thirty-three million, seven hundred sixty-eight thousand, five hundred thirty-nine".