16681007 has 8 divisors (see below), whose sum is σ = 19679232. Its totient is φ = 13836600.

The previous prime is 16681001. The next prime is 16681013. The reversal of 16681007 is 70018661.

It is an interprime number because it is at equal distance from previous prime (16681001) and next prime (16681013).

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 16681007 - 2⁶ = 16680943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681001) 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, 38219 + ... + 38652.

It is an arithmetic number, because the mean of its divisors is an integer number (2459904).

Almost surely, 2^16681007 is an apocalyptic number.

16681007 is a deficient number, since it is larger than the sum of its proper divisors (2998225).

16681007 is an equidigital number, since it uses as much as digits as its factorization.

16681007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76909.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 16681007 is about 4084.2388519772. The cubic root of 16681007 is about 255.5097173475.

Adding to 16681007 its reverse (70018661), we get a palindrome (86699668).

The spelling of 16681007 in words is "sixteen million, six hundred eighty-one thousand, seven".