80661585 has 8 divisors (see below), whose sum is σ = 129058560. Its totient is φ = 43019504.

The previous prime is 80661563. The next prime is 80661587. The reversal of 80661585 is 58516608.

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 80661585 - 2⁶ = 80661521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80661587) 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 in 7 ways as a sum of consecutive naturals, for example, 2688705 + ... + 2688734.

It is an arithmetic number, because the mean of its divisors is an integer number (16132320).

Almost surely, 2^80661585 is an apocalyptic number.

It is an amenable number.

80661585 is a deficient number, since it is larger than the sum of its proper divisors (48396975).

80661585 is a wasteful number, since it uses less digits than its factorization.

80661585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5377447.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 80661585 is about 8981.1794882410. The cubic root of 80661585 is about 432.0714634433.

The spelling of 80661585 in words is "eighty million, six hundred sixty-one thousand, five hundred eighty-five".