16620005 has 16 divisors (see below), whose sum is σ = 20684160. Its totient is φ = 12811968.

The previous prime is 16620001. The next prime is 16620013. The reversal of 16620005 is 50002661.

It is not a de Polignac number, because 16620005 - 2² = 16620001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16620001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15104 + ... + 16166.

It is an arithmetic number, because the mean of its divisors is an integer number (1292760).

Almost surely, 2^16620005 is an apocalyptic number.

It is an amenable number.

16620005 is a deficient number, since it is larger than the sum of its proper divisors (4064155).

16620005 is a wasteful number, since it uses less digits than its factorization.

16620005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 16620005 is about 4076.7640353594. The cubic root of 16620005 is about 255.1978728167.

Adding to 16620005 its reverse (50002661), we get a palindrome (66622666).

The spelling of 16620005 in words is "sixteen million, six hundred twenty thousand, five".