6616656 has 30 divisors (see below), whose sum is σ = 18517850. Its totient is φ = 2205504.

The previous prime is 6616651. The next prime is 6616657. The reversal of 6616656 is 6566166.

It can be written as a sum of positive squares in only one way, i.e., 6350400 + 266256 = 2520^2 + 516^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6616656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6616651) 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 5 ways as a sum of consecutive naturals, for example, 22831 + ... + 23118.

Almost surely, 2^6616656 is an apocalyptic number.

It is an amenable number.

6616656 is an abundant number, since it is smaller than the sum of its proper divisors (11901194).

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

6616656 is a wasteful number, since it uses less digits than its factorization.

6616656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45963 (or 45954 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 6616656 is about 2572.2861427143. The cubic root of 6616656 is about 187.7354056586.

The spelling of 6616656 in words is "six million, six hundred sixteen thousand, six hundred fifty-six".