6629752720 has 20 divisors (see below), whose sum is σ = 15414175260. Its totient is φ = 2651901056.

The previous prime is 6629752637. The next prime is 6629752733. The reversal of 6629752720 is 272579266.

It can be written as a sum of positive squares in 2 ways, for example, as 1387413504 + 5242339216 = 37248^2 + 72404^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×6629752720² = 87907242256694796800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41435875 + ... + 41436034.

It is an arithmetic number, because the mean of its divisors is an integer number (770708763).

Almost surely, 2^6629752720 is an apocalyptic number.

It is an amenable number.

6629752720 is an abundant number, since it is smaller than the sum of its proper divisors (8784422540).

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

6629752720 is a wasteful number, since it uses less digits than its factorization.

6629752720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82871922 (or 82871916 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 46.

The square root of 6629752720 is about 81423.2934730597. The cubic root of 6629752720 is about 1878.5918911240.

The spelling of 6629752720 in words is "six billion, six hundred twenty-nine million, seven hundred fifty-two thousand, seven hundred twenty".