106665599 has 8 divisors (see below), whose sum is σ = 113228928. Its totient is φ = 100134400.

The previous prime is 106665593. The next prime is 106665617. The reversal of 106665599 is 995566601.

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

It is a cyclic number.

It is not a de Polignac number, because 106665599 - 2²⁰ = 105617023 is a prime.

It is a super-2 number, since 2×106665599² = 22755100020057602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106665593) 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, 1007 + ... + 14640.

It is an arithmetic number, because the mean of its divisors is an integer number (14153616).

Almost surely, 2^106665599 is an apocalyptic number.

106665599 is a deficient number, since it is larger than the sum of its proper divisors (6563329).

106665599 is a wasteful number, since it uses less digits than its factorization.

106665599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16065.

The product of its (nonzero) digits is 437400, while the sum is 47.

The square root of 106665599 is about 10327.9039015669. The cubic root of 106665599 is about 474.2508582699.

The spelling of 106665599 in words is "one hundred six million, six hundred sixty-five thousand, five hundred ninety-nine".