16625705 has 8 divisors (see below), whose sum is σ = 20437704. Its totient is φ = 12976000.

The previous prime is 16625701. The next prime is 16625723. The reversal of 16625705 is 50752661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 473344 + 16152361 = 688^2 + 4019^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16625705 - 2² = 16625701 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16625701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40346 + ... + 40755.

It is an arithmetic number, because the mean of its divisors is an integer number (2554713).

Almost surely, 2^16625705 is an apocalyptic number.

It is an amenable number.

16625705 is a deficient number, since it is larger than the sum of its proper divisors (3811999).

16625705 is an equidigital number, since it uses as much as digits as its factorization.

16625705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81147.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 16625705 is about 4077.4630593054. The cubic root of 16625705 is about 255.2270437187.

The spelling of 16625705 in words is "sixteen million, six hundred twenty-five thousand, seven hundred five".