8061998906 has 12 divisors (see below), whose sum is σ = 13023968622. Its totient is φ = 3720711264.

The previous prime is 8061998837. The next prime is 8061998929. The reversal of 8061998906 is 6098991608.

It can be written as a sum of positive squares in 3 ways, for example, as 7183410025 + 878588881 = 84755^2 + 29641^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 449030 + ... + 466638.

Almost surely, 2^8061998906 is an apocalyptic number.

8061998906 is a deficient number, since it is larger than the sum of its proper divisors (4961969716).

8061998906 is an frugal number, since it uses more digits than its factorization.

8061998906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35233 (or 17624 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 56.

The square root of 8061998906 is about 89788.6346148553. The cubic root of 8061998906 is about 2005.1532859178.

The spelling of 8061998906 in words is "eight billion, sixty-one million, nine hundred ninety-eight thousand, nine hundred six".