7777666707005 has 16 divisors (see below), whose sum is σ = 10055572377984. Its totient is φ = 5740974085440.

The previous prime is 7777666706983. The next prime is 7777666707007. The reversal of 7777666707005 is 5007076667777.

It is not a de Polignac number, because 7777666707005 - 2¹⁶ = 7777666641469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7777666707007) 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 in 15 ways as a sum of consecutive naturals, for example, 26243561 + ... + 26538270.

It is an arithmetic number, because the mean of its divisors is an integer number (628473273624).

Almost surely, 2^{7777666707005} is an apocalyptic number.

It is an amenable number.

7777666707005 is a deficient number, since it is larger than the sum of its proper divisors (2277905670979).

7777666707005 is a wasteful number, since it uses less digits than its factorization.

7777666707005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52784116.

The product of its (nonzero) digits is 127060920, while the sum is 65.

The spelling of 7777666707005 in words is "seven trillion, seven hundred seventy-seven billion, six hundred sixty-six million, seven hundred seven thousand, five".