66711074387 has 8 divisors (see below), whose sum is σ = 68320482912. Its totient is φ = 65120272000.

The previous prime is 66711074377. The next prime is 66711074447. The reversal of 66711074387 is 78347011766.

It is a happy number.

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 66711074387 - 2⁶ = 66711074323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66711074357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4644278 + ... + 4658619.

It is an arithmetic number, because the mean of its divisors is an integer number (8540060364).

Almost surely, 2^66711074387 is an apocalyptic number.

66711074387 is a deficient number, since it is larger than the sum of its proper divisors (1609408525).

66711074387 is a wasteful number, since it uses less digits than its factorization.

66711074387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9303069.

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 66711074387 in words is "sixty-six billion, seven hundred eleven million, seventy-four thousand, three hundred eighty-seven".