6670664 has 128 divisors (see below), whose sum is σ = 18144000. Its totient is φ = 2257920.

The previous prime is 6670661. The next prime is 6670687. The reversal of 6670664 is 4660766.

6670664 = 141² + 142² + ... + 283².

6670664 is digitally balanced in base 5, 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 (6670661) 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, 392384 + ... + 392400.

It is an arithmetic number, because the mean of its divisors is an integer number (141750).

Almost surely, 2^6670664 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 6670664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9072000).

6670664 is an abundant number, since it is smaller than the sum of its proper divisors (11473336).

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

6670664 is a wasteful number, since it uses less digits than its factorization.

6670664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 6670664 is about 2582.7628617432. The cubic root of 6670664 is about 188.2448146073.

The spelling of 6670664 in words is "six million, six hundred seventy thousand, six hundred sixty-four".