6651562608 has 120 divisors (see below), whose sum is σ = 18923848320. Its totient is φ = 2180597760.

The previous prime is 6651562573. The next prime is 6651562609. The reversal of 6651562608 is 8062651566.

It is a happy number.

6651562608 is a `hidden beast` number, since 6 + 6 + 5 + 15 + 626 + 0 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651562609) 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, 5034588 + ... + 5035908.

It is an arithmetic number, because the mean of its divisors is an integer number (157698736).

Almost surely, 2^6651562608 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 6651562608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9461924160).

6651562608 is an abundant number, since it is smaller than the sum of its proper divisors (12272285712).

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

6651562608 is a wasteful number, since it uses less digits than its factorization.

6651562608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1887 (or 1878 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 6651562608 is about 81557.1125531060. The cubic root of 6651562608 is about 1880.6496366653.

The spelling of 6651562608 in words is "six billion, six hundred fifty-one million, five hundred sixty-two thousand, six hundred eight".