100666506 has 8 divisors (see below), whose sum is σ = 201333024. Its totient is φ = 33555500.

The previous prime is 100666499. The next prime is 100666507. The reversal of 100666506 is 605666001.

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

100666506 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (100666507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8388870 + ... + 8388881.

It is an arithmetic number, because the mean of its divisors is an integer number (25166628).

Almost surely, 2^100666506 is an apocalyptic number.

100666506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

100666506 is a wasteful number, since it uses less digits than its factorization.

100666506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16777756.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 100666506 is about 10033.2699555030. The cubic root of 100666506 is about 465.1878163715.

The spelling of 100666506 in words is "one hundred million, six hundred sixty-six thousand, five hundred six".