73666547317687 has 2 divisors, whose sum is σ = 73666547317688. Its totient is φ = 73666547317686.

The previous prime is 73666547317673. The next prime is 73666547317717. The reversal of 73666547317687 is 78671374566637.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73666547317687 - 2³⁹ = 73116791503799 is a prime.

It is a super-3 number, since 3×73666547317687³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73666547318687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36833273658843 + 36833273658844.

It is an arithmetic number, because the mean of its divisors is an integer number (36833273658844).

Almost surely, 2^{73666547317687} is an apocalyptic number.

73666547317687 is a deficient number, since it is larger than the sum of its proper divisors (1).

73666547317687 is an equidigital number, since it uses as much as digits as its factorization.

73666547317687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4480842240, while the sum is 76.

The spelling of 73666547317687 in words is "seventy-three trillion, six hundred sixty-six billion, five hundred forty-seven million, three hundred seventeen thousand, six hundred eighty-seven".