80066669 has 4 divisors (see below), whose sum is σ = 80192220. Its totient is φ = 79941120.

The previous prime is 80066663. The next prime is 80066681. The reversal of 80066669 is 96666008.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35844169 + 44222500 = 5987^2 + 6650^2 .

It is a cyclic number.

It is not a de Polignac number, because 80066669 - 2⁴ = 80066653 is a prime.

It is a super-3 number, since 3×80066669³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80066663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61814 + ... + 63095.

It is an arithmetic number, because the mean of its divisors is an integer number (20048055).

Almost surely, 2^80066669 is an apocalyptic number.

It is an amenable number.

80066669 is a deficient number, since it is larger than the sum of its proper divisors (125551).

80066669 is a wasteful number, since it uses less digits than its factorization.

80066669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125550.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 80066669 is about 8947.9980442555. The cubic root of 80066669 is about 431.0065997773.

The spelling of 80066669 in words is "eighty million, sixty-six thousand, six hundred sixty-nine".