66144067607 has 2 divisors, whose sum is σ = 66144067608. Its totient is φ = 66144067606.

The previous prime is 66144067579. The next prime is 66144067669. The reversal of 66144067607 is 70676044166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66144067607 - 2⁶ = 66144067543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66144967607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33072033803 + 33072033804.

It is an arithmetic number, because the mean of its divisors is an integer number (33072033804).

Almost surely, 2^66144067607 is an apocalyptic number.

66144067607 is a deficient number, since it is larger than the sum of its proper divisors (1).

66144067607 is an equidigital number, since it uses as much as digits as its factorization.

66144067607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 47.

The spelling of 66144067607 in words is "sixty-six billion, one hundred forty-four million, sixty-seven thousand, six hundred seven".