80665406 has 8 divisors (see below), whose sum is σ = 121133664. Its totient is φ = 40287520.

The previous prime is 80665397. The next prime is 80665451. The reversal of 80665406 is 60456608.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 20315 + ... + 23958.

It is an arithmetic number, because the mean of its divisors is an integer number (15141708).

Almost surely, 2^80665406 is an apocalyptic number.

80665406 is a deficient number, since it is larger than the sum of its proper divisors (40468258).

80665406 is a wasteful number, since it uses less digits than its factorization.

80665406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45186.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 80665406 is about 8981.3922083383. The cubic root of 80665406 is about 432.0782858524.

The spelling of 80665406 in words is "eighty million, six hundred sixty-five thousand, four hundred six".