666848208 has 120 divisors (see below), whose sum is σ = 1893330208. Its totient is φ = 201049344.

The previous prime is 666848207. The next prime is 666848233. The reversal of 666848208 is 802848666.

It is a happy number.

It is a super-2 number, since 2×666848208² = 889373065025622528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666848207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2171991 + ... + 2172297.

Almost surely, 2^666848208 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 666848208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (946665104).

666848208 is an abundant number, since it is smaller than the sum of its proper divisors (1226482000).

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

666848208 is a wasteful number, since it uses less digits than its factorization.

666848208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 48.

The square root of 666848208 is about 25823.4042682215. The cubic root of 666848208 is about 873.6597530209.

The spelling of 666848208 in words is "six hundred sixty-six million, eight hundred forty-eight thousand, two hundred eight".