677645886834 has 96 divisors (see below), whose sum is σ = 1739988432000. Its totient is φ = 186490225152.

The previous prime is 677645886823. The next prime is 677645886851. The reversal of 677645886834 is 438688546776.

It is a happy number.

677645886834 is a `hidden beast` number, since 6 + 7 + 7 + 6 + 4 + 588 + 6 + 8 + 34 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1309722 + ... + 1752330.

It is an arithmetic number, because the mean of its divisors is an integer number (18124879500).

Almost surely, 2^677645886834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 677645886834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (869994216000).

677645886834 is an abundant number, since it is smaller than the sum of its proper divisors (1062342545166).

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

677645886834 is a wasteful number, since it uses less digits than its factorization.

677645886834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443072 (or 443069 counting only the distinct ones).

The product of its digits is 1300561920, while the sum is 72.

The spelling of 677645886834 in words is "six hundred seventy-seven billion, six hundred forty-five million, eight hundred eighty-six thousand, eight hundred thirty-four".