6669663264 has 216 divisors, whose sum is σ = 21337492176. Its totient is φ = 1973664000.

The previous prime is 6669663173. The next prime is 6669663283. The reversal of 6669663264 is 4623669666.

It is a happy number.

It is a super-2 number, since 2×6669663264² = 88968816110302267392, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 6669663264.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1496239 + ... + 1500689.

It is an arithmetic number, because the mean of its divisors is an integer number (98784686).

Almost surely, 2^6669663264 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 6669663264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10668746088).

6669663264 is an abundant number, since it is smaller than the sum of its proper divisors (14667828912).

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

6669663264 is a wasteful number, since it uses less digits than its factorization.

6669663264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532 (or 4510 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 54.

The square root of 6669663264 is about 81668.0063672427. The cubic root of 6669663264 is about 1882.3540061275.

The spelling of 6669663264 in words is "six billion, six hundred sixty-nine million, six hundred sixty-three thousand, two hundred sixty-four".