80668213 has 4 divisors (see below), whose sum is σ = 85413420. Its totient is φ = 75923008.

The previous prime is 80668193. The next prime is 80668219. The reversal of 80668213 is 31286608.

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 39413284 + 41254929 = 6278^2 + 6423^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80668213 is a prime.

It is a super-2 number, since 2×80668213² = 13014721177226738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80668219) 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, 2372578 + ... + 2372611.

It is an arithmetic number, because the mean of its divisors is an integer number (21353355).

Almost surely, 2^80668213 is an apocalyptic number.

It is an amenable number.

80668213 is a deficient number, since it is larger than the sum of its proper divisors (4745207).

80668213 is a wasteful number, since it uses less digits than its factorization.

80668213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4745206.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 80668213 is about 8981.5484745115. The cubic root of 80668213 is about 432.0832976236.

The spelling of 80668213 in words is "eighty million, six hundred sixty-eight thousand, two hundred thirteen".