6669037440 has 768 divisors, whose sum is σ = 27266803200. Its totient is φ = 1495203840.

The previous prime is 6669037433. The next prime is 6669037481. The reversal of 6669037440 is 447309666.

It is a super-2 number, since 2×6669037440² = 88952120752243507200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 215130225 + ... + 215130255.

It is an arithmetic number, because the mean of its divisors is an integer number (35503650).

Almost surely, 2^6669037440 is an apocalyptic number.

6669037440 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 6669037440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13633401600).

6669037440 is an abundant number, since it is smaller than the sum of its proper divisors (20597765760).

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

6669037440 is a wasteful number, since it uses less digits than its factorization.

6669037440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The square root of 6669037440 is about 81664.1747647033. The cubic root of 6669037440 is about 1882.2951296338.

The spelling of 6669037440 in words is "six billion, six hundred sixty-nine million, thirty-seven thousand, four hundred forty".