77666115020 has 48 divisors (see below), whose sum is σ = 177868306560. Its totient is φ = 28313715456.

The previous prime is 77666115011. The next prime is 77666115047. The reversal of 77666115020 is 2051166677.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1870067 + ... + 1911146.

It is an arithmetic number, because the mean of its divisors is an integer number (3705589720).

Almost surely, 2^77666115020 is an apocalyptic number.

It is an amenable number.

77666115020 is an abundant number, since it is smaller than the sum of its proper divisors (100202191540).

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

77666115020 is a wasteful number, since it uses less digits than its factorization.

77666115020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3781314 (or 3781312 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 77666115020 in words is "seventy-seven billion, six hundred sixty-six million, one hundred fifteen thousand, twenty".