8081662672 has 20 divisors (see below), whose sum is σ = 15660326916. Its totient is φ = 4040288000.

The previous prime is 8081662669. The next prime is 8081662681. The reversal of 8081662672 is 2762661808.

It can be written as a sum of positive squares in 2 ways, for example, as 3185022096 + 4896640576 = 56436^2 + 69976^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106308 + ... + 165724.

Almost surely, 2^8081662672 is an apocalyptic number.

It is an amenable number.

8081662672 is a deficient number, since it is larger than the sum of its proper divisors (7578664244).

8081662672 is a wasteful number, since it uses less digits than its factorization.

8081662672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67926 (or 67920 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 8081662672 is about 89898.0682328603. The cubic root of 8081662672 is about 2006.7821975673.

The spelling of 8081662672 in words is "eight billion, eighty-one million, six hundred sixty-two thousand, six hundred seventy-two".