80560661 has 4 divisors (see below), whose sum is σ = 83159424. Its totient is φ = 77961900.

The previous prime is 80560657. The next prime is 80560663. The reversal of 80560661 is 16606508.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 80560661 - 2² = 80560657 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 (80560663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1299335 + ... + 1299396.

It is an arithmetic number, because the mean of its divisors is an integer number (20789856).

Almost surely, 2^80560661 is an apocalyptic number.

It is an amenable number.

80560661 is a deficient number, since it is larger than the sum of its proper divisors (2598763).

80560661 is a wasteful number, since it uses less digits than its factorization.

80560661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598762.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 80560661 is about 8975.5590912210. The cubic root of 80560661 is about 431.8911852277.

The spelling of 80560661 in words is "eighty million, five hundred sixty thousand, six hundred sixty-one".