16662207 has 8 divisors (see below), whose sum is σ = 22432384. Its totient is φ = 11000088.

The previous prime is 16662203. The next prime is 16662229. The reversal of 16662207 is 70226661.

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

It is not a de Polignac number, because 16662207 - 2² = 16662203 is a prime.

It is a super-2 number, since 2×16662207² = 555258284221698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16662203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26653 + ... + 27270.

It is an arithmetic number, because the mean of its divisors is an integer number (2804048).

Almost surely, 2^16662207 is an apocalyptic number.

16662207 is a deficient number, since it is larger than the sum of its proper divisors (5770177).

16662207 is a wasteful number, since it uses less digits than its factorization.

16662207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54029.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 16662207 is about 4081.9366727082. The cubic root of 16662207 is about 255.4136922012.

Adding to 16662207 its reverse (70226661), we get a palindrome (86888868).

The spelling of 16662207 in words is "sixteen million, six hundred sixty-two thousand, two hundred seven".