16659797 has 24 divisors (see below), whose sum is σ = 21766080. Its totient is φ = 12386880.

The previous prime is 16659787. The next prime is 16659809. The reversal of 16659797 is 79795661.

It is not a de Polignac number, because 16659797 - 2⁴ = 16659781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16659707) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40529 + ... + 40937.

It is an arithmetic number, because the mean of its divisors is an integer number (906920).

Almost surely, 2^16659797 is an apocalyptic number.

It is an amenable number.

16659797 is a deficient number, since it is larger than the sum of its proper divisors (5106283).

16659797 is a wasteful number, since it uses less digits than its factorization.

16659797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 450 counting only the distinct ones).

The product of its digits is 714420, while the sum is 50.

The square root of 16659797 is about 4081.6414590211. The cubic root of 16659797 is about 255.4013773725.

The spelling of 16659797 in words is "sixteen million, six hundred fifty-nine thousand, seven hundred ninety-seven".