80564566 has 4 divisors (see below), whose sum is σ = 120846852. Its totient is φ = 40282282.

The previous prime is 80564563. The next prime is 80564587. The reversal of 80564566 is 66546508.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80564563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20141140 + ... + 20141143.

It is an arithmetic number, because the mean of its divisors is an integer number (30211713).

Almost surely, 2^80564566 is an apocalyptic number.

80564566 is a deficient number, since it is larger than the sum of its proper divisors (40282286).

80564566 is a wasteful number, since it uses less digits than its factorization.

80564566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40282285.

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 80564566 is about 8975.7766237803. The cubic root of 80564566 is about 431.8981634385.

The spelling of 80564566 in words is "eighty million, five hundred sixty-four thousand, five hundred sixty-six".