66673668 has 48 divisors (see below), whose sum is σ = 161743680. Its totient is φ = 21350784.

The previous prime is 66673657. The next prime is 66673687. The reversal of 66673668 is 86637666.

It is a happy number.

66673668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98146 + ... + 98822.

It is an arithmetic number, because the mean of its divisors is an integer number (3369660).

Almost surely, 2^66673668 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 66673668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80871840).

66673668 is an abundant number, since it is smaller than the sum of its proper divisors (95070012).

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

66673668 is a wasteful number, since it uses less digits than its factorization.

66673668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996 (or 994 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 48.

The square root of 66673668 is about 8165.3945403759. The cubic root of 66673668 is about 405.4943270492.

The spelling of 66673668 in words is "sixty-six million, six hundred seventy-three thousand, six hundred sixty-eight".