8086161661 has 4 divisors (see below), whose sum is σ = 8177017500. Its totient is φ = 7995305824.

The previous prime is 8086161659. The next prime is 8086161679. The reversal of 8086161661 is 1661616808.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1639035225 + 6447126436 = 40485^2 + 80294^2 .

It is a cyclic number.

It is not a de Polignac number, because 8086161661 - 2¹ = 8086161659 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 (8086161641) 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, 45427786 + ... + 45427963.

It is an arithmetic number, because the mean of its divisors is an integer number (2044254375).

Almost surely, 2^8086161661 is an apocalyptic number.

It is an amenable number.

8086161661 is a deficient number, since it is larger than the sum of its proper divisors (90855839).

8086161661 is an equidigital number, since it uses as much as digits as its factorization.

8086161661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90855838.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 8086161661 is about 89923.0874747970. The cubic root of 8086161661 is about 2007.1545143606.

The spelling of 8086161661 in words is "eight billion, eighty-six million, one hundred sixty-one thousand, six hundred sixty-one".