7081663986 has 24 divisors (see below), whose sum is σ = 15455607804. Its totient is φ = 2343323520.

The previous prime is 7081663969. The next prime is 7081663993. The reversal of 7081663986 is 6893661807.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6794869761 + 286794225 = 82431^2 + 16935^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1433395 + ... + 1438326.

Almost surely, 2^7081663986 is an apocalyptic number.

7081663986 is an abundant number, since it is smaller than the sum of its proper divisors (8373943818).

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

7081663986 is a wasteful number, since it uses less digits than its factorization.

7081663986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871866 (or 2871863 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 7081663986 is about 84152.6231676708. The cubic root of 7081663986 is about 1920.3413732200.

The spelling of 7081663986 in words is "seven billion, eighty-one million, six hundred sixty-three thousand, nine hundred eighty-six".