16656464 has 80 divisors (see below), whose sum is σ = 39372480. Its totient is φ = 6727680.

The previous prime is 16656463. The next prime is 16656533. The reversal of 16656464 is 46465661.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16656463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56702 + ... + 56994.

It is an arithmetic number, because the mean of its divisors is an integer number (492156).

Almost surely, 2^16656464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16656464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19686240).

16656464 is an abundant number, since it is smaller than the sum of its proper divisors (22716016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16656464 is a wasteful number, since it uses less digits than its factorization.

16656464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 342 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 16656464 is about 4081.2331469790. The cubic root of 16656464 is about 255.3843441604.

The spelling of 16656464 in words is "sixteen million, six hundred fifty-six thousand, four hundred sixty-four".