16655657 has 8 divisors (see below), whose sum is σ = 17979840. Its totient is φ = 15381520.

The previous prime is 16655651. The next prime is 16655689. The reversal of 16655657 is 75655661.

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

It is a cyclic number.

It is not a de Polignac number, because 16655657 - 2⁶ = 16655593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16655651) 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, 11819 + ... + 13152.

It is an arithmetic number, because the mean of its divisors is an integer number (2247480).

Almost surely, 2^16655657 is an apocalyptic number.

It is an amenable number.

16655657 is a deficient number, since it is larger than the sum of its proper divisors (1324183).

16655657 is a wasteful number, since it uses less digits than its factorization.

16655657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25023.

The product of its digits is 189000, while the sum is 41.

The square root of 16655657 is about 4081.1342786044. The cubic root of 16655657 is about 255.3802196657.

The spelling of 16655657 in words is "sixteen million, six hundred fifty-five thousand, six hundred fifty-seven".