77866183388085 has 16 divisors (see below), whose sum is σ = 124629047592576. Its totient is φ = 41514246416448.

The previous prime is 77866183388051. The next prime is 77866183388171. The reversal of 77866183388085 is 58088338166877.

It is not a de Polignac number, because 77866183388085 - 2¹⁰ = 77866183387061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77866183388085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 899000494 + ... + 899087103.

It is an arithmetic number, because the mean of its divisors is an integer number (7789315474536).

Almost surely, 2^{77866183388085} is an apocalyptic number.

It is an amenable number.

77866183388085 is a deficient number, since it is larger than the sum of its proper divisors (46762864204491).

77866183388085 is a wasteful number, since it uses less digits than its factorization.

77866183388085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798090492.

The product of its (nonzero) digits is 2601123840, while the sum is 78.

The spelling of 77866183388085 in words is "seventy-seven trillion, eight hundred sixty-six billion, one hundred eighty-three million, three hundred eighty-eight thousand, eighty-five".