7777666361 has 8 divisors (see below), whose sum is σ = 8288504064. Its totient is φ = 7281218560.

The previous prime is 7777666331. The next prime is 7777666381. The reversal of 7777666361 is 1636667777.

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

It is a de Polignac number, because none of the positive numbers 2^k-7777666361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7777666297 and 7777666306.

It is not an unprimeable number, because it can be changed into a prime (7777666331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3596360 + ... + 3598521.

It is an arithmetic number, because the mean of its divisors is an integer number (1036063008).

Almost surely, 2^7777666361 is an apocalyptic number.

It is an amenable number.

7777666361 is a deficient number, since it is larger than the sum of its proper divisors (510837703).

7777666361 is a wasteful number, since it uses less digits than its factorization.

7777666361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7194951.

The product of its digits is 9335088, while the sum is 56.

The square root of 7777666361 is about 88191.0786928020. The cubic root of 7777666361 is about 1981.2978567907.

The spelling of 7777666361 in words is "seven billion, seven hundred seventy-seven million, six hundred sixty-six thousand, three hundred sixty-one".