6670721007 has 16 divisors (see below), whose sum is σ = 10021743360. Its totient is φ = 4384510200.

The previous prime is 6670720999. The next prime is 6670721011. The reversal of 6670721007 is 7001270766.

It is not a de Polignac number, because 6670721007 - 2³ = 6670720999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6670728007) 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, 1737969 + ... + 1741802.

It is an arithmetic number, because the mean of its divisors is an integer number (626358960).

Almost surely, 2^6670721007 is an apocalyptic number.

6670721007 is a deficient number, since it is larger than the sum of its proper divisors (3351022353).

6670721007 is a wasteful number, since it uses less digits than its factorization.

6670721007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479851 (or 3479845 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 6670721007 is about 81674.4819818283. The cubic root of 6670721007 is about 1882.4535084787.

The spelling of 6670721007 in words is "six billion, six hundred seventy million, seven hundred twenty-one thousand, seven".