66736707366751 has 2 divisors, whose sum is σ = 66736707366752. Its totient is φ = 66736707366750.

The previous prime is 66736707366661. The next prime is 66736707366773. The reversal of 66736707366751 is 15766370763766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66736707366751 - 2²¹ = 66736705269599 is a prime.

It is a super-2 number, since 2×66736707366751² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66736707369751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33368353683375 + 33368353683376.

It is an arithmetic number, because the mean of its divisors is an integer number (33368353683376).

Almost surely, 2^{66736707366751} is an apocalyptic number.

66736707366751 is a deficient number, since it is larger than the sum of its proper divisors (1).

66736707366751 is an equidigital number, since it uses as much as digits as its factorization.

66736707366751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840157920, while the sum is 70.

The spelling of 66736707366751 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred seven million, three hundred sixty-six thousand, seven hundred fifty-one".