66804083737 has 2 divisors, whose sum is σ = 66804083738. Its totient is φ = 66804083736.

The previous prime is 66804083699. The next prime is 66804083743. The reversal of 66804083737 is 73738040866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53614939401 + 13189144336 = 231549^2 + 114844^2 .

It is a cyclic number.

It is not a de Polignac number, because 66804083737 - 2³⁵ = 32444345369 is a prime.

It is not a weakly prime, because it can be changed into another prime (66804083747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33402041868 + 33402041869.

It is an arithmetic number, because the mean of its divisors is an integer number (33402041869).

Almost surely, 2^66804083737 is an apocalyptic number.

It is an amenable number.

66804083737 is a deficient number, since it is larger than the sum of its proper divisors (1).

66804083737 is an equidigital number, since it uses as much as digits as its factorization.

66804083737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 66804083737 in words is "sixty-six billion, eight hundred four million, eighty-three thousand, seven hundred thirty-seven".