66889151712671 has 2 divisors, whose sum is σ = 66889151712672. Its totient is φ = 66889151712670.

The previous prime is 66889151712623. The next prime is 66889151712743. The reversal of 66889151712671 is 17621715198866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66889151712671 - 2¹⁴ = 66889151696287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66889151712601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33444575856335 + 33444575856336.

It is an arithmetic number, because the mean of its divisors is an integer number (33444575856336).

Almost surely, 2^{66889151712671} is an apocalyptic number.

66889151712671 is a deficient number, since it is larger than the sum of its proper divisors (1).

66889151712671 is an equidigital number, since it uses as much as digits as its factorization.

66889151712671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60963840, while the sum is 68.

The spelling of 66889151712671 in words is "sixty-six trillion, eight hundred eighty-nine billion, one hundred fifty-one million, seven hundred twelve thousand, six hundred seventy-one".