677779999998 has 16 divisors (see below), whose sum is σ = 1357574213136. Its totient is φ = 225590964480.

The previous prime is 677779999991. The next prime is 677779999999. The reversal of 677779999998 is 899999977776.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677779999991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83921173 + ... + 83929248.

It is an arithmetic number, because the mean of its divisors is an integer number (84848388321).

Almost surely, 2^677779999998 is an apocalyptic number.

677779999998 is an abundant number, since it is smaller than the sum of its proper divisors (679794213138).

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

677779999998 is a wasteful number, since it uses less digits than its factorization.

677779999998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167851099.

The product of its digits is 61247512368, while the sum is 96.

The spelling of 677779999998 in words is "six hundred seventy-seven billion, seven hundred seventy-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight".