767660066777 has 2 divisors, whose sum is σ = 767660066778. Its totient is φ = 767660066776.

The previous prime is 767660066753. The next prime is 767660066827. The reversal of 767660066777 is 777660066767.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 463746018121 + 303914048656 = 680989^2 + 551284^2 .

It is a cyclic number.

It is not a de Polignac number, because 767660066777 - 2²⁴ = 767643289561 is a prime.

It is not a weakly prime, because it can be changed into another prime (767660063777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383830033388 + 383830033389.

It is an arithmetic number, because the mean of its divisors is an integer number (383830033389).

Almost surely, 2^767660066777 is an apocalyptic number.

It is an amenable number.

767660066777 is a deficient number, since it is larger than the sum of its proper divisors (1).

767660066777 is an equidigital number, since it uses as much as digits as its factorization.

767660066777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 130691232, while the sum is 65.

The spelling of 767660066777 in words is "seven hundred sixty-seven billion, six hundred sixty million, sixty-six thousand, seven hundred seventy-seven".