7777773466685 has 4 divisors (see below), whose sum is σ = 9333328160028. Its totient is φ = 6222218773344.

The previous prime is 7777773466681. The next prime is 7777773466717. The reversal of 7777773466685 is 5866643777777.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2130624831556 + 5647148635129 = 1459666^2 + 2376373^2 .

It is a cyclic number.

It is not a de Polignac number, because 7777773466685 - 2² = 7777773466681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7777773466681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777777346664 + ... + 777777346673.

It is an arithmetic number, because the mean of its divisors is an integer number (2333332040007).

Almost surely, 2^{7777773466685} is an apocalyptic number.

It is an amenable number.

7777773466685 is a deficient number, since it is larger than the sum of its proper divisors (1555554693343).

7777773466685 is a wasteful number, since it uses less digits than its factorization.

7777773466685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555554693342.

The product of its digits is 12197848320, while the sum is 80.

The spelling of 7777773466685 in words is "seven trillion, seven hundred seventy-seven billion, seven hundred seventy-three million, four hundred sixty-six thousand, six hundred eighty-five".