6669400320 has 216 divisors, whose sum is σ = 25173675072. Its totient is φ = 1616793600.

The previous prime is 6669400313. The next prime is 6669400333. The reversal of 6669400320 is 230049666.

It is a super-2 number, since 2×6669400320² = 88961801256832204800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100405 + ... + 153035.

It is an arithmetic number, because the mean of its divisors is an integer number (116544792).

Almost surely, 2^6669400320 is an apocalyptic number.

6669400320 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 6669400320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12586837536).

6669400320 is an abundant number, since it is smaller than the sum of its proper divisors (18504274752).

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

6669400320 is a wasteful number, since it uses less digits than its factorization.

6669400320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52669 (or 52652 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 6669400320 is about 81666.3965165600. The cubic root of 6669400320 is about 1882.3292692366.

Adding to 6669400320 its reverse (230049666), we get a palindrome (6899449986).

The spelling of 6669400320 in words is "six billion, six hundred sixty-nine million, four hundred thousand, three hundred twenty".