100642266 has 24 divisors (see below), whose sum is σ = 219027744. Its totient is φ = 33398280.

The previous prime is 100642247. The next prime is 100642271. The reversal of 100642266 is 662246001.

It is a happy number.

100642266 is a `hidden beast` number, since 10 + 0 + 642 + 2 + 6 + 6 = 666.

It is a super-2 number, since 2×100642266² = 20257731411229512, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8230 + ... + 16401.

It is an arithmetic number, because the mean of its divisors is an integer number (9126156).

Almost surely, 2^100642266 is an apocalyptic number.

100642266 is an abundant number, since it is smaller than the sum of its proper divisors (118385478).

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

100642266 is a wasteful number, since it uses less digits than its factorization.

100642266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24866 (or 24863 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 100642266 is about 10032.0619017229. The cubic root of 100642266 is about 465.1504750606.

Adding to 100642266 its reverse (662246001), we get a palindrome (762888267).

The spelling of 100642266 in words is "one hundred million, six hundred forty-two thousand, two hundred sixty-six".