77769308668 has 12 divisors (see below), whose sum is σ = 136098270000. Its totient is φ = 38884088672.

The previous prime is 77769308663. The next prime is 77769308677. The reversal of 77769308668 is 86680396777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77769308663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388833 + ... + 553831.

It is an arithmetic number, because the mean of its divisors is an integer number (11341522500).

Almost surely, 2^77769308668 is an apocalyptic number.

It is an amenable number.

77769308668 is a deficient number, since it is larger than the sum of its proper divisors (58328961332).

77769308668 is a wasteful number, since it uses less digits than its factorization.

77769308668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282836 (or 282834 counting only the distinct ones).

The product of its (nonzero) digits is 128024064, while the sum is 67.

The spelling of 77769308668 in words is "seventy-seven billion, seven hundred sixty-nine million, three hundred eight thousand, six hundred sixty-eight".