80665500465 has 24 divisors (see below), whose sum is σ = 152531129088. Its totient is φ = 39110545440.

The previous prime is 80665500403. The next prime is 80665500523. The reversal of 80665500465 is 56400556608.

It is a happy number.

80665500465 is a `hidden beast` number, since 80 + 6 + 6 + 5 + 500 + 4 + 65 = 666.

It is not a de Polignac number, because 80665500465 - 2⁷ = 80665500337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 80665500465.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81479809 + ... + 81480798.

It is an arithmetic number, because the mean of its divisors is an integer number (6355463712).

Almost surely, 2^80665500465 is an apocalyptic number.

It is an amenable number.

80665500465 is a deficient number, since it is larger than the sum of its proper divisors (71865628623).

80665500465 is a wasteful number, since it uses less digits than its factorization.

80665500465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162960629 (or 162960626 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 80665500465 in words is "eighty billion, six hundred sixty-five million, five hundred thousand, four hundred sixty-five".