667662880 has 96 divisors (see below), whose sum is σ = 1621529280. Its totient is φ = 259691520.

The previous prime is 667662797. The next prime is 667662881. The reversal of 667662880 is 88266766.

667662880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (667662881) 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, 1009750 + ... + 1010410.

It is an arithmetic number, because the mean of its divisors is an integer number (16890930).

Almost surely, 2^667662880 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 667662880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (810764640).

667662880 is an abundant number, since it is smaller than the sum of its proper divisors (953866400).

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

667662880 is a wasteful number, since it uses less digits than its factorization.

667662880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842 (or 834 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 667662880 is about 25839.1733613906. The cubic root of 667662880 is about 874.0153844251.

The spelling of 667662880 in words is "six hundred sixty-seven million, six hundred sixty-two thousand, eight hundred eighty".