80199566 has 4 divisors (see below), whose sum is σ = 120299352. Its totient is φ = 40099782.

The previous prime is 80199517. The next prime is 80199569. The reversal of 80199566 is 66599108.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80199569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20049890 + ... + 20049893.

It is an arithmetic number, because the mean of its divisors is an integer number (30074838).

Almost surely, 2^80199566 is an apocalyptic number.

80199566 is a deficient number, since it is larger than the sum of its proper divisors (40099786).

80199566 is a wasteful number, since it uses less digits than its factorization.

80199566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40099785.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 80199566 is about 8955.4210397948. The cubic root of 80199566 is about 431.2449337499.

The spelling of 80199566 in words is "eighty million, one hundred ninety-nine thousand, five hundred sixty-six".