80001666 has 24 divisors (see below), whose sum is σ = 182460720. Its totient is φ = 25263576.

The previous prime is 80001631. The next prime is 80001673. The reversal of 80001666 is 66610008.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116620 + ... + 117303.

It is an arithmetic number, because the mean of its divisors is an integer number (7602530).

Almost surely, 2^80001666 is an apocalyptic number.

80001666 is an abundant number, since it is smaller than the sum of its proper divisors (102459054).

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

80001666 is a wasteful number, since it uses less digits than its factorization.

80001666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233950 (or 233947 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 80001666 is about 8944.3650417456. The cubic root of 80001666 is about 430.8899290591.

The spelling of 80001666 in words is "eighty million, one thousand, six hundred sixty-six".