16623007 has 4 divisors (see below), whose sum is σ = 16976736. Its totient is φ = 16269280.

The previous prime is 16623001. The next prime is 16623011. The reversal of 16623007 is 70032661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16623007 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 (16623001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176794 + ... + 176887.

It is an arithmetic number, because the mean of its divisors is an integer number (4244184).

Almost surely, 2^16623007 is an apocalyptic number.

16623007 is a deficient number, since it is larger than the sum of its proper divisors (353729).

16623007 is an equidigital number, since it uses as much as digits as its factorization.

16623007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353728.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 16623007 is about 4077.1322029093. The cubic root of 16623007 is about 255.2132369896.

Adding to 16623007 its reverse (70032661), we get a palindrome (86655668).

The spelling of 16623007 in words is "sixteen million, six hundred twenty-three thousand, seven".