6656249754 has 384 divisors, whose sum is σ = 19667681280. Its totient is φ = 1576972800.

The previous prime is 6656249753. The next prime is 6656249759. The reversal of 6656249754 is 4579426566.

6656249754 is a `hidden beast` number, since 6 + 6 + 5 + 624 + 9 + 7 + 5 + 4 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6656249754.

It is not an unprimeable number, because it can be changed into a prime (6656249753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 84256287 + ... + 84256365.

It is an arithmetic number, because the mean of its divisors is an integer number (51217920).

Almost surely, 2^6656249754 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6656249754, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9833840640).

6656249754 is an abundant number, since it is smaller than the sum of its proper divisors (13011431526).

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

6656249754 is a wasteful number, since it uses less digits than its factorization.

6656249754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 223 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The square root of 6656249754 is about 81585.8428527891. The cubic root of 6656249754 is about 1881.0912777366.

The spelling of 6656249754 in words is "six billion, six hundred fifty-six million, two hundred forty-nine thousand, seven hundred fifty-four".