6664651448 has 64 divisors (see below), whose sum is σ = 15532413120. Its totient is φ = 2610432000.

The previous prime is 6664651447. The next prime is 6664651453. The reversal of 6664651448 is 8441564666.

It is a junction number, because it is equal to n+sod(n) for n = 6664651396 and 6664651405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664651447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28208 + ... + 118848.

It is an arithmetic number, because the mean of its divisors is an integer number (242693955).

Almost surely, 2^6664651448 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 6664651448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7766206560).

6664651448 is an abundant number, since it is smaller than the sum of its proper divisors (8867761672).

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

6664651448 is a wasteful number, since it uses less digits than its factorization.

6664651448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90768 (or 90764 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 50.

The square root of 6664651448 is about 81637.3165164069. The cubic root of 6664651448 is about 1881.8823993135.

The spelling of 6664651448 in words is "six billion, six hundred sixty-four million, six hundred fifty-one thousand, four hundred forty-eight".