66316407061 has 2 divisors, whose sum is σ = 66316407062. Its totient is φ = 66316407060.

The previous prime is 66316406999. The next prime is 66316407077. The reversal of 66316407061 is 16070461366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64788066225 + 1528340836 = 254535^2 + 39094^2 .

It is a cyclic number.

It is not a de Polignac number, because 66316407061 - 2⁹ = 66316406549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66316407361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33158203530 + 33158203531.

It is an arithmetic number, because the mean of its divisors is an integer number (33158203531).

Almost surely, 2^66316407061 is an apocalyptic number.

It is an amenable number.

66316407061 is a deficient number, since it is larger than the sum of its proper divisors (1).

66316407061 is an equidigital number, since it uses as much as digits as its factorization.

66316407061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 66316407061 in words is "sixty-six billion, three hundred sixteen million, four hundred seven thousand, sixty-one".