80665407 has 6 divisors (see below), whose sum is σ = 116516712. Its totient is φ = 53776932.

The previous prime is 80665397. The next prime is 80665451. The reversal of 80665407 is 70456608.

It is a happy number.

It is not a de Polignac number, because 80665407 - 2¹⁸ = 80403263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80665457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4481403 + ... + 4481420.

It is an arithmetic number, because the mean of its divisors is an integer number (19419452).

Almost surely, 2^80665407 is an apocalyptic number.

80665407 is a deficient number, since it is larger than the sum of its proper divisors (35851305).

80665407 is a wasteful number, since it uses less digits than its factorization.

80665407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8962829 (or 8962826 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 80665407 is about 8981.3922640090. The cubic root of 80665407 is about 432.0782876379.

The spelling of 80665407 in words is "eighty million, six hundred sixty-five thousand, four hundred seven".