666783348 has 96 divisors (see below), whose sum is σ = 1950305280. Its totient is φ = 172247040.

The previous prime is 666783331. The next prime is 666783373. The reversal of 666783348 is 843387666.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 666783348.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176463 + ... + 180201.

It is an arithmetic number, because the mean of its divisors is an integer number (20315680).

Almost surely, 2^666783348 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 666783348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (975152640).

666783348 is an abundant number, since it is smaller than the sum of its proper divisors (1283521932).

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

666783348 is a wasteful number, since it uses less digits than its factorization.

666783348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3957 (or 3955 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 51.

The square root of 666783348 is about 25822.1484001622. The cubic root of 666783348 is about 873.6314270299.

The spelling of 666783348 in words is "six hundred sixty-six million, seven hundred eighty-three thousand, three hundred forty-eight".