80665712 has 20 divisors (see below), whose sum is σ = 156641760. Its totient is φ = 40242048.

The previous prime is 80665703. The next prime is 80665723. The reversal of 80665712 is 21756608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1964 + ... + 12852.

It is an arithmetic number, because the mean of its divisors is an integer number (7832088).

Almost surely, 2^80665712 is an apocalyptic number.

It is an amenable number.

80665712 is a deficient number, since it is larger than the sum of its proper divisors (75976048).

80665712 is a wasteful number, since it uses less digits than its factorization.

80665712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11360 (or 11354 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 80665712 is about 8981.4092435430. The cubic root of 80665712 is about 432.0788322072.

The spelling of 80665712 in words is "eighty million, six hundred sixty-five thousand, seven hundred twelve".