767660066768 has 80 divisors (see below), whose sum is σ = 1703249973120. Its totient is φ = 328333824000.

The previous prime is 767660066753. The next prime is 767660066777. The reversal of 767660066768 is 867660066767.

It is a super-2 number, since 2×767660066768² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132329468 + ... + 132335268.

It is an arithmetic number, because the mean of its divisors is an integer number (21290624664).

Almost surely, 2^767660066768 is an apocalyptic number.

It is an amenable number.

767660066768 is an abundant number, since it is smaller than the sum of its proper divisors (935589906352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

767660066768 is a wasteful number, since it uses less digits than its factorization.

767660066768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7996 (or 7990 counting only the distinct ones).

The product of its (nonzero) digits is 128024064, while the sum is 65.

Subtracting 767660066768 from its reverse (867660066767), we obtain a palindrome (99999999999).

The spelling of 767660066768 in words is "seven hundred sixty-seven billion, six hundred sixty million, sixty-six thousand, seven hundred sixty-eight".