16506625 has 32 divisors (see below), whose sum is σ = 21909888. Its totient is φ = 12398400.

The previous prime is 16506619. The next prime is 16506629. The reversal of 16506625 is 52660561.

It is not a de Polignac number, because 16506625 - 2¹¹ = 16504577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16506629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198834 + ... + 198916.

It is an arithmetic number, because the mean of its divisors is an integer number (684684).

Almost surely, 2^16506625 is an apocalyptic number.

It is an amenable number.

16506625 is a deficient number, since it is larger than the sum of its proper divisors (5403263).

16506625 is an equidigital number, since it uses as much as digits as its factorization.

16506625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 16506625 is about 4062.8346016051. The cubic root of 16506625 is about 254.6162367897.

The spelling of 16506625 in words is "sixteen million, five hundred six thousand, six hundred twenty-five".