16665007 has 4 divisors (see below), whose sum is σ = 16717896. Its totient is φ = 16612120.

The previous prime is 16665001. The next prime is 16665023. The reversal of 16665007 is 70056661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16665007 - 2¹¹ = 16662959 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16665007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16665001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25969 + ... + 26602.

It is an arithmetic number, because the mean of its divisors is an integer number (4179474).

Almost surely, 2^16665007 is an apocalyptic number.

16665007 is a deficient number, since it is larger than the sum of its proper divisors (52889).

16665007 is an equidigital number, since it uses as much as digits as its factorization.

16665007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52888.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 16665007 is about 4082.2796327542. The cubic root of 16665007 is about 255.4279983949.

The spelling of 16665007 in words is "sixteen million, six hundred sixty-five thousand, seven".