100666231 has 4 divisors (see below), whose sum is σ = 106587792. Its totient is φ = 94744672.

The previous prime is 100666229. The next prime is 100666243. The reversal of 100666231 is 132666001.

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

It is not a de Polignac number, because 100666231 - 2¹ = 100666229 is a prime.

It is a super-2 number, since 2×100666231² = 20267380127490722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100666196 and 100666205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100666261) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2960755 + ... + 2960788.

It is an arithmetic number, because the mean of its divisors is an integer number (26646948).

Almost surely, 2^100666231 is an apocalyptic number.

100666231 is a deficient number, since it is larger than the sum of its proper divisors (5921561).

100666231 is an equidigital number, since it uses as much as digits as its factorization.

100666231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5921560.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 100666231 is about 10033.2562510882. The cubic root of 100666231 is about 465.1873927722.

The spelling of 100666231 in words is "one hundred million, six hundred sixty-six thousand, two hundred thirty-one".