66362307709 has 2 divisors, whose sum is σ = 66362307710. Its totient is φ = 66362307708.

The previous prime is 66362307607. The next prime is 66362307727. The reversal of 66362307709 is 90770326366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39978802809 + 26383504900 = 199947^2 + 162430^2 .

It is a cyclic number.

It is not a de Polignac number, because 66362307709 - 2¹³ = 66362299517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66362307749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33181153854 + 33181153855.

It is an arithmetic number, because the mean of its divisors is an integer number (33181153855).

Almost surely, 2^66362307709 is an apocalyptic number.

It is an amenable number.

66362307709 is a deficient number, since it is larger than the sum of its proper divisors (1).

66362307709 is an equidigital number, since it uses as much as digits as its factorization.

66362307709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1714608, while the sum is 49.

The spelling of 66362307709 in words is "sixty-six billion, three hundred sixty-two million, three hundred seven thousand, seven hundred nine".