80668216 has 8 divisors (see below), whose sum is σ = 151252920. Its totient is φ = 40334104.

The previous prime is 80668193. The next prime is 80668219. The reversal of 80668216 is 61286608.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×80668216² = 13014722145245312, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 5041756 + ... + 5041771.

It is an arithmetic number, because the mean of its divisors is an integer number (18906615).

Almost surely, 2^80668216 is an apocalyptic number.

It is an amenable number.

80668216 is a deficient number, since it is larger than the sum of its proper divisors (70584704).

80668216 is a wasteful number, since it uses less digits than its factorization.

80668216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10083533 (or 10083529 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 80668216 is about 8981.5486415206. The cubic root of 80668216 is about 432.0833029799.

The spelling of 80668216 in words is "eighty million, six hundred sixty-eight thousand, two hundred sixteen".