77766166166777 has 8 divisors (see below), whose sum is σ = 84919564753920. Its totient is φ = 70626725432560.

The previous prime is 77766166166771. The next prime is 77766166166803.

77766166166777 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77766166166777 - 2⁴ = 77766166166761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77766166166771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3489451577 + ... + 3489473862.

It is an arithmetic number, because the mean of its divisors is an integer number (10614945594240).

Almost surely, 2^{77766166166777} is an apocalyptic number.

It is an amenable number.

77766166166777 is a deficient number, since it is larger than the sum of its proper divisors (7153398587143).

77766166166777 is a wasteful number, since it uses less digits than its factorization.

77766166166777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6978926463.

The product of its digits is 5489031744, while the sum is 80.

The spelling of 77766166166777 in words is "seventy-seven trillion, seven hundred sixty-six billion, one hundred sixty-six million, one hundred sixty-six thousand, seven hundred seventy-seven".