6621233652 has 192 divisors, whose sum is σ = 19821957120. Its totient is φ = 1891612800.

The previous prime is 6621233651. The next prime is 6621233683. The reversal of 6621233652 is 2563321266.

6621233652 is a `hidden beast` number, since 6 + 621 + 23 + 3 + 6 + 5 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6621233651) 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 63 ways as a sum of consecutive naturals, for example, 1938298 + ... + 1941710.

It is an arithmetic number, because the mean of its divisors is an integer number (103239360).

Almost surely, 2^6621233652 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 6621233652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9910978560).

6621233652 is an abundant number, since it is smaller than the sum of its proper divisors (13200723468).

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

6621233652 is a wasteful number, since it uses less digits than its factorization.

6621233652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3531 (or 3523 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 6621233652 is about 81370.9631994116. The cubic root of 6621233652 is about 1877.7868982135.

The spelling of 6621233652 in words is "six billion, six hundred twenty-one million, two hundred thirty-three thousand, six hundred fifty-two".