66410587673 has 2 divisors, whose sum is σ = 66410587674. Its totient is φ = 66410587672.

The previous prime is 66410587657. The next prime is 66410587687. The reversal of 66410587673 is 37678501466.

66410587673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53642265664 + 12768322009 = 231608^2 + 112997^2 .

It is a cyclic number.

It is not a de Polignac number, because 66410587673 - 2⁴ = 66410587657 is a prime.

It is not a weakly prime, because it can be changed into another prime (66410587693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33205293836 + 33205293837.

It is an arithmetic number, because the mean of its divisors is an integer number (33205293837).

Almost surely, 2^66410587673 is an apocalyptic number.

It is an amenable number.

66410587673 is a deficient number, since it is larger than the sum of its proper divisors (1).

66410587673 is an equidigital number, since it uses as much as digits as its factorization.

66410587673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 66410587673 in words is "sixty-six billion, four hundred ten million, five hundred eighty-seven thousand, six hundred seventy-three".