66549336767 has 2 divisors, whose sum is σ = 66549336768. Its totient is φ = 66549336766.

The previous prime is 66549336719. The next prime is 66549336779. The reversal of 66549336767 is 76763394566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66549336767 - 2²⁴ = 66532559551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66549335767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33274668383 + 33274668384.

It is an arithmetic number, because the mean of its divisors is an integer number (33274668384).

Almost surely, 2^66549336767 is an apocalyptic number.

66549336767 is a deficient number, since it is larger than the sum of its proper divisors (1).

66549336767 is an equidigital number, since it uses as much as digits as its factorization.

66549336767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102876480, while the sum is 62.

The spelling of 66549336767 in words is "sixty-six billion, five hundred forty-nine million, three hundred thirty-six thousand, seven hundred sixty-seven".