77100666688 has 28 divisors (see below), whose sum is σ = 153024758212. Its totient is φ = 38543247360.

The previous prime is 77100666683. The next prime is 77100666697. The reversal of 77100666688 is 88666600177.

It can be written as a sum of positive squares in 2 ways, for example, as 46590359104 + 30510307584 = 215848^2 + 174672^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77100666683) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 249256 + ... + 465112.

Almost surely, 2^77100666688 is an apocalyptic number.

It is an amenable number.

77100666688 is a deficient number, since it is larger than the sum of its proper divisors (75924091524).

77100666688 is a wasteful number, since it uses less digits than its factorization.

77100666688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221450 (or 221440 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 77100666688 in words is "seventy-seven billion, one hundred million, six hundred sixty-six thousand, six hundred eighty-eight".