66745454767 has 2 divisors, whose sum is σ = 66745454768. Its totient is φ = 66745454766.

The previous prime is 66745454747. The next prime is 66745454777. The reversal of 66745454767 is 76745454766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66745454767 - 2⁷ = 66745454639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66745454747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33372727383 + 33372727384.

It is an arithmetic number, because the mean of its divisors is an integer number (33372727384).

Almost surely, 2^66745454767 is an apocalyptic number.

66745454767 is a deficient number, since it is larger than the sum of its proper divisors (1).

66745454767 is an equidigital number, since it uses as much as digits as its factorization.

66745454767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 118540800, while the sum is 61.

Subtracting 66745454767 from its reverse (76745454766), we obtain a palindrome (9999999999).

The spelling of 66745454767 in words is "sixty-six billion, seven hundred forty-five million, four hundred fifty-four thousand, seven hundred sixty-seven".