66067646719 has 2 divisors, whose sum is σ = 66067646720. Its totient is φ = 66067646718.

The previous prime is 66067646629. The next prime is 66067646767. The reversal of 66067646719 is 91764676066.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66067646719 - 2⁷ = 66067646591 is a prime.

It is a super-2 number, since 2×66067646719² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66067646419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33033823359 + 33033823360.

It is an arithmetic number, because the mean of its divisors is an integer number (33033823360).

Almost surely, 2^66067646719 is an apocalyptic number.

66067646719 is a deficient number, since it is larger than the sum of its proper divisors (1).

66067646719 is an equidigital number, since it uses as much as digits as its factorization.

66067646719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13716864, while the sum is 58.

The spelling of 66067646719 in words is "sixty-six billion, sixty-seven million, six hundred forty-six thousand, seven hundred nineteen".