80211666 has 16 divisors (see below), whose sum is σ = 160513344. Its totient is φ = 26722224.

The previous prime is 80211647. The next prime is 80211679. The reversal of 80211666 is 66611208.

It is a super-2 number, since 2×80211666² = 12867822724991112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15211 + ... + 19793.

It is an arithmetic number, because the mean of its divisors is an integer number (10032084).

Almost surely, 2^80211666 is an apocalyptic number.

80211666 is an abundant number, since it is smaller than the sum of its proper divisors (80301678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80211666 is a wasteful number, since it uses less digits than its factorization.

80211666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7505.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 80211666 is about 8956.0965827753. The cubic root of 80211666 is about 431.2666204894.

The spelling of 80211666 in words is "eighty million, two hundred eleven thousand, six hundred sixty-six".