66710376737 has 2 divisors, whose sum is σ = 66710376738. Its totient is φ = 66710376736.

The previous prime is 66710376731. The next prime is 66710376767. The reversal of 66710376737 is 73767301766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43398888976 + 23311487761 = 208324^2 + 152681^2 .

It is a cyclic number.

It is not a de Polignac number, because 66710376737 - 2⁶ = 66710376673 is a prime.

It is not a weakly prime, because it can be changed into another prime (66710376731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33355188368 + 33355188369.

It is an arithmetic number, because the mean of its divisors is an integer number (33355188369).

Almost surely, 2^66710376737 is an apocalyptic number.

It is an amenable number.

66710376737 is a deficient number, since it is larger than the sum of its proper divisors (1).

66710376737 is an equidigital number, since it uses as much as digits as its factorization.

66710376737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4667544, while the sum is 53.

The spelling of 66710376737 in words is "sixty-six billion, seven hundred ten million, three hundred seventy-six thousand, seven hundred thirty-seven".