80660009 has 4 divisors (see below), whose sum is σ = 80700816. Its totient is φ = 80619204.

The previous prime is 80660003. The next prime is 80660017. The reversal of 80660009 is 90006608.

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 a cyclic number.

It is not a de Polignac number, because 80660009 - 2⁴ = 80659993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80660003) 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 3 ways as a sum of consecutive naturals, for example, 17279 + ... + 21444.

It is an arithmetic number, because the mean of its divisors is an integer number (20175204).

Almost surely, 2^80660009 is an apocalyptic number.

It is an amenable number.

80660009 is a deficient number, since it is larger than the sum of its proper divisors (40807).

80660009 is a wasteful number, since it uses less digits than its factorization.

80660009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40806.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 80660009 is about 8981.0917487798. The cubic root of 80660009 is about 432.0686494269.

The spelling of 80660009 in words is "eighty million, six hundred sixty thousand, nine".