7776666645164 has 6 divisors (see below), whose sum is σ = 13609166629044. Its totient is φ = 3888333322580.

The previous prime is 7776666645161. The next prime is 7776666645169. The reversal of 7776666645164 is 4615466666777.

It is a super-2 number, since 2×7776666645164² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7776666645161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972083330642 + ... + 972083330649.

It is an arithmetic number, because the mean of its divisors is an integer number (2268194438174).

Almost surely, 2^{7776666645164} is an apocalyptic number.

It is an amenable number.

7776666645164 is a deficient number, since it is larger than the sum of its proper divisors (5832499983880).

7776666645164 is a wasteful number, since it uses less digits than its factorization.

7776666645164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944166661295 (or 1944166661293 counting only the distinct ones).

The product of its digits is 1280240640, while the sum is 71.

The spelling of 7776666645164 in words is "seven trillion, seven hundred seventy-six billion, six hundred sixty-six million, six hundred forty-five thousand, one hundred sixty-four".