6987776 has 28 divisors (see below), whose sum is σ = 13991082. Its totient is φ = 3489792.

The previous prime is 6987769. The next prime is 6987793. The reversal of 6987776 is 6777896.

It can be written as a sum of positive squares in only one way, i.e., 6885376 + 102400 = 2624^2 + 320^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7766 + ... + 8618.

Almost surely, 2^6987776 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 6987776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6995541).

6987776 is an abundant number, since it is smaller than the sum of its proper divisors (7003306).

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

6987776 is an frugal number, since it uses more digits than its factorization.

6987776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879 (or 855 counting only the distinct ones).

The product of its digits is 889056, while the sum is 50.

The square root of 6987776 is about 2643.4401827921. The cubic root of 6987776 is about 191.1817025843.

The spelling of 6987776 in words is "six million, nine hundred eighty-seven thousand, seven hundred seventy-six".