677787787776 has 160 divisors (see below), whose sum is σ = 1989328942656. Its totient is φ = 203356160000.

The previous prime is 677787787757. The next prime is 677787787967.

677787787776 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1507906 + ... + 1905086.

Almost surely, 2^677787787776 is an apocalyptic number.

677787787776 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 677787787776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (994664471328).

677787787776 is an abundant number, since it is smaller than the sum of its proper divisors (1311541154880).

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

677787787776 is a wasteful number, since it uses less digits than its factorization.

677787787776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397314 (or 397298 counting only the distinct ones).

The product of its digits is 13282101504, while the sum is 84.

The spelling of 677787787776 in words is "six hundred seventy-seven billion, seven hundred eighty-seven million, seven hundred eighty-seven thousand, seven hundred seventy-six".