16606997 has 4 divisors (see below), whose sum is σ = 18116736. Its totient is φ = 15097260.

The previous prime is 16606991. The next prime is 16607039. The reversal of 16606997 is 79960661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79960661 = 11 ⋅7269151.

It is a cyclic number.

It is not a de Polignac number, because 16606997 - 2¹⁰ = 16605973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16606991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754853 + ... + 754874.

It is an arithmetic number, because the mean of its divisors is an integer number (4529184).

Almost surely, 2^16606997 is an apocalyptic number.

It is an amenable number.

16606997 is a deficient number, since it is larger than the sum of its proper divisors (1509739).

16606997 is a wasteful number, since it uses less digits than its factorization.

16606997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509738.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 16606997 is about 4075.1683400812. The cubic root of 16606997 is about 255.1312767604.

The spelling of 16606997 in words is "sixteen million, six hundred six thousand, nine hundred ninety-seven".