80166197 has 4 divisors (see below), whose sum is σ = 80253420. Its totient is φ = 80078976.

The previous prime is 80166143. The next prime is 80166199. The reversal of 80166197 is 79166108.

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 1062961 + 79103236 = 1031^2 + 8894^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80166197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80166197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80166199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42218 + ... + 44075.

It is an arithmetic number, because the mean of its divisors is an integer number (20063355).

Almost surely, 2^80166197 is an apocalyptic number.

It is an amenable number.

80166197 is a deficient number, since it is larger than the sum of its proper divisors (87223).

80166197 is an equidigital number, since it uses as much as digits as its factorization.

80166197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87222.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 80166197 is about 8953.5577844787. The cubic root of 80166197 is about 431.1851154359.

The spelling of 80166197 in words is "eighty million, one hundred sixty-six thousand, one hundred ninety-seven".