66736703373701 has 2 divisors, whose sum is σ = 66736703373702. Its totient is φ = 66736703373700.

The previous prime is 66736703373581. The next prime is 66736703373709. The reversal of 66736703373701 is 10737330763766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60323197773601 + 6413505600100 = 7766801^2 + 2532490^2 .

It is a cyclic number.

It is not a de Polignac number, because 66736703373701 - 2⁴² = 62338656862597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66736703373709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33368351686850 + 33368351686851.

It is an arithmetic number, because the mean of its divisors is an integer number (33368351686851).

Almost surely, 2^{66736703373701} is an apocalyptic number.

It is an amenable number.

66736703373701 is a deficient number, since it is larger than the sum of its proper divisors (1).

66736703373701 is an equidigital number, since it uses as much as digits as its factorization.

66736703373701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42007896, while the sum is 59.

The spelling of 66736703373701 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred three million, three hundred seventy-three thousand, seven hundred one".