6638565032 has 64 divisors (see below), whose sum is σ = 13859553600. Its totient is φ = 2955363840.

The previous prime is 6638565001. The next prime is 6638565071. The reversal of 6638565032 is 2305658366.

It is a super-2 number, since 2×6638565032² = 88141091368186322048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4005548 + ... + 4007204.

It is an arithmetic number, because the mean of its divisors is an integer number (216555525).

Almost surely, 2^6638565032 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 6638565032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6929776800).

6638565032 is an abundant number, since it is smaller than the sum of its proper divisors (7220988568).

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

6638565032 is a wasteful number, since it uses less digits than its factorization.

6638565032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586 (or 2582 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 44.

The square root of 6638565032 is about 81477.3896980015. The cubic root of 6638565032 is about 1879.4238682774.

The spelling of 6638565032 in words is "six billion, six hundred thirty-eight million, five hundred sixty-five thousand, thirty-two".