16662225 has 12 divisors (see below), whose sum is σ = 27548336. Its totient is φ = 8886480.

The previous prime is 16662203. The next prime is 16662229. The reversal of 16662225 is 52226661.

It is not a de Polignac number, because 16662225 - 2⁶ = 16662161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16662192 and 16662201.

It is not an unprimeable number, because it can be changed into a prime (16662229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111007 + ... + 111156.

Almost surely, 2^16662225 is an apocalyptic number.

16662225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16662225 is a deficient number, since it is larger than the sum of its proper divisors (10886111).

16662225 is a wasteful number, since it uses less digits than its factorization.

16662225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222176 (or 222171 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 16662225 is about 4081.9388775434. The cubic root of 16662225 is about 255.4137841747.

Adding to 16662225 its reverse (52226661), we get a palindrome (68888886).

The spelling of 16662225 in words is "sixteen million, six hundred sixty-two thousand, two hundred twenty-five".