6635969040 has 160 divisors (see below), whose sum is σ = 21835388160. Its totient is φ = 1661386752.

The previous prime is 6635969033. The next prime is 6635969069. The reversal of 6635969040 is 409695366.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1862781 + ... + 1866339.

It is an arithmetic number, because the mean of its divisors is an integer number (136471176).

Almost surely, 2^6635969040 is an apocalyptic number.

6635969040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6635969040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10917694080).

6635969040 is an abundant number, since it is smaller than the sum of its proper divisors (15199419120).

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

6635969040 is a wasteful number, since it uses less digits than its factorization.

6635969040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4049 (or 4043 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 48.

The square root of 6635969040 is about 81461.4573893691. The cubic root of 6635969040 is about 1879.1788552155.

The spelling of 6635969040 in words is "six billion, six hundred thirty-five million, nine hundred sixty-nine thousand, forty".