106664728 has 8 divisors (see below), whose sum is σ = 199996380. Its totient is φ = 53332360.

The previous prime is 106664717. The next prime is 106664741. The reversal of 106664728 is 827466601.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×106664728² = 22754728398627968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6666538 + ... + 6666553.

Almost surely, 2^106664728 is an apocalyptic number.

It is an amenable number.

106664728 is a deficient number, since it is larger than the sum of its proper divisors (93331652).

106664728 is a wasteful number, since it uses less digits than its factorization.

106664728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13333097 (or 13333093 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 106664728 is about 10327.8617341636. The cubic root of 106664728 is about 474.2495674019.

The spelling of 106664728 in words is "one hundred six million, six hundred sixty-four thousand, seven hundred twenty-eight".