677777778390 has 48 divisors (see below), whose sum is σ = 1646501689008. Its totient is φ = 178563087168.

The previous prime is 677777778319. The next prime is 677777778421. The reversal of 677777778390 is 93877777776.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1433089 + ... + 1846428.

It is an arithmetic number, because the mean of its divisors is an integer number (34302118521).

Almost surely, 2^677777778390 is an apocalyptic number.

677777778390 is an abundant number, since it is smaller than the sum of its proper divisors (968723910618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

677777778390 is a wasteful number, since it uses less digits than its factorization.

677777778390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3279693 (or 3279610 counting only the distinct ones).

The product of its (nonzero) digits is 1067311728, while the sum is 75.

The spelling of 677777778390 in words is "six hundred seventy-seven billion, seven hundred seventy-seven million, seven hundred seventy-eight thousand, three hundred ninety".