66736707406723 has 2 divisors, whose sum is σ = 66736707406724. Its totient is φ = 66736707406722.

The previous prime is 66736707406709. The next prime is 66736707406739. The reversal of 66736707406723 is 32760470763766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66736707406723 - 2¹³ = 66736707398531 is a prime.

It is not a weakly prime, because it can be changed into another prime (66736707406793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33368353703361 + 33368353703362.

It is an arithmetic number, because the mean of its divisors is an integer number (33368353703362).

Almost surely, 2^{66736707406723} is an apocalyptic number.

66736707406723 is a deficient number, since it is larger than the sum of its proper divisors (1).

66736707406723 is an equidigital number, since it uses as much as digits as its factorization.

66736707406723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224042112, while the sum is 64.

The spelling of 66736707406723 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred seven million, four hundred six thousand, seven hundred twenty-three".