100166566 has 4 divisors (see below), whose sum is σ = 150249852. Its totient is φ = 50083282.

The previous prime is 100166557. The next prime is 100166579. The reversal of 100166566 is 665661001.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25041640 + ... + 25041643.

It is an arithmetic number, because the mean of its divisors is an integer number (37562463).

Almost surely, 2^100166566 is an apocalyptic number.

100166566 is a deficient number, since it is larger than the sum of its proper divisors (50083286).

100166566 is an equidigital number, since it uses as much as digits as its factorization.

100166566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50083285.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 100166566 is about 10008.3248348562. The cubic root of 100166566 is about 464.4164507028.

The spelling of 100166566 in words is "one hundred million, one hundred sixty-six thousand, five hundred sixty-six".