7777777777690 has 8 divisors (see below), whose sum is σ = 13999999999860. Its totient is φ = 3111111111072.

The previous prime is 7777777777681. The next prime is 7777777777691. The reversal of 7777777777690 is 967777777777.

It can be written as a sum of positive squares in 2 ways, for example, as 7775882829729 + 1894947961 = 2788527^2 + 43531^2 .

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

It is a super-2 number, since 2×7777777777690² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7777777777598 and 7777777777607.

It is not an unprimeable number, because it can be changed into a prime (7777777777691) 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, 388888888875 + ... + 388888888894.

Almost surely, 2^{7777777777690} is an apocalyptic number.

7777777777690 is a deficient number, since it is larger than the sum of its proper divisors (6222222222170).

7777777777690 is a wasteful number, since it uses less digits than its factorization.

7777777777690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777777777776.

The product of its (nonzero) digits is 15253663446, while the sum is 85.

The spelling of 7777777777690 in words is "seven trillion, seven hundred seventy-seven billion, seven hundred seventy-seven million, seven hundred seventy-seven thousand, six hundred ninety".