677780000000 has 144 divisors (see below), whose sum is σ = 1691186100240. Its totient is φ = 271104000000.

The previous prime is 677779999999. The next prime is 677780000041. The reversal of 677780000000 is 87776.

It can be written as a sum of positive squares in 8 ways, for example, as 647548527616 + 30231472384 = 804704^2 + 173872^2 .

It is a congruent number.

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, 19983056 + ... + 20016944.

Almost surely, 2^677780000000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 677780000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845593050120).

677780000000 is an abundant number, since it is smaller than the sum of its proper divisors (1013406100240).

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

677780000000 is an frugal number, since it uses more digits than its factorization.

677780000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33940 (or 33896 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 35.

Adding to 677780000000 its reverse (87776), we get a palindrome (677780087776).

The spelling of 677780000000 in words is "six hundred seventy-seven billion, seven hundred eighty million", and thus it is an aban number.