80661171 has 8 divisors (see below), whose sum is σ = 107596944. Its totient is φ = 53749760.

The previous prime is 80661157. The next prime is 80661181. The reversal of 80661171 is 17116608.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80661171 - 2¹⁹ = 80136883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80661181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4051 + ... + 13331.

It is an arithmetic number, because the mean of its divisors is an integer number (13449618).

Almost surely, 2^80661171 is an apocalyptic number.

80661171 is a deficient number, since it is larger than the sum of its proper divisors (26935773).

80661171 is a wasteful number, since it uses less digits than its factorization.

80661171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12181.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 80661171 is about 8981.1564400137. The cubic root of 80661171 is about 432.0707242319.

Adding to 80661171 its reverse (17116608), we get a palindrome (97777779).

The spelling of 80661171 in words is "eighty million, six hundred sixty-one thousand, one hundred seventy-one".