666884448 has 192 divisors, whose sum is σ = 2086801920. Its totient is φ = 206654976.

The previous prime is 666884447. The next prime is 666884507. The reversal of 666884448 is 844488666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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

It is a junction number, because it is equal to n+sod(n) for n = 666884394 and 666884403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666884447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 734811 + ... + 735717.

It is an arithmetic number, because the mean of its divisors is an integer number (10868760).

Almost surely, 2^666884448 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 666884448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1043400960).

666884448 is an abundant number, since it is smaller than the sum of its proper divisors (1419917472).

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

666884448 is a wasteful number, since it uses less digits than its factorization.

666884448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986 (or 972 counting only the distinct ones).

The product of its digits is 7077888, while the sum is 54.

The square root of 666884448 is about 25824.1059477381. The cubic root of 666884448 is about 873.6755791392.

The spelling of 666884448 in words is "six hundred sixty-six million, eight hundred eighty-four thousand, four hundred forty-eight".