66954086737 has 2 divisors, whose sum is σ = 66954086738. Its totient is φ = 66954086736.

The previous prime is 66954086677. The next prime is 66954086741. The reversal of 66954086737 is 73768045966.

66954086737 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., 35244805696 + 31709281041 = 187736^2 + 178071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66954086737 is a prime.

It is not a weakly prime, because it can be changed into another prime (66954086137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33477043368 + 33477043369.

It is an arithmetic number, because the mean of its divisors is an integer number (33477043369).

Almost surely, 2^66954086737 is an apocalyptic number.

It is an amenable number.

66954086737 is a deficient number, since it is larger than the sum of its proper divisors (1).

66954086737 is an equidigital number, since it uses as much as digits as its factorization.

66954086737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45722880, while the sum is 61.

The spelling of 66954086737 in words is "sixty-six billion, nine hundred fifty-four million, eighty-six thousand, seven hundred thirty-seven".