100666947 has 8 divisors (see below), whose sum is σ = 135526144. Its totient is φ = 66459528.

The previous prime is 100666939. The next prime is 100666949. The reversal of 100666947 is 749666001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100666947 - 2³ = 100666939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100666949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162583 + ... + 163200.

It is an arithmetic number, because the mean of its divisors is an integer number (16940768).

Almost surely, 2^100666947 is an apocalyptic number.

100666947 is a deficient number, since it is larger than the sum of its proper divisors (34859197).

100666947 is a wasteful number, since it uses less digits than its factorization.

100666947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325889.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 100666947 is about 10033.2919323620. The cubic root of 100666947 is about 465.1884956690.

The spelling of 100666947 in words is "one hundred million, six hundred sixty-six thousand, nine hundred forty-seven".