8098705661 has 4 divisors (see below), whose sum is σ = 8196280512. Its totient is φ = 8001130812.

The previous prime is 8098705609. The next prime is 8098705663. The reversal of 8098705661 is 1665078908.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8098705661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8098705663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48787301 + ... + 48787466.

It is an arithmetic number, because the mean of its divisors is an integer number (2049070128).

Almost surely, 2^8098705661 is an apocalyptic number.

It is an amenable number.

8098705661 is a deficient number, since it is larger than the sum of its proper divisors (97574851).

8098705661 is an equidigital number, since it uses as much as digits as its factorization.

8098705661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97574850.

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 8098705661 is about 89992.8089404926. The cubic root of 8098705661 is about 2008.1918725512.

The spelling of 8098705661 in words is "eight billion, ninety-eight million, seven hundred five thousand, six hundred sixty-one".