6670164521 has 8 divisors (see below), whose sum is σ = 6697566120. Its totient is φ = 6642819072.

The previous prime is 6670164469. The next prime is 6670164539. The reversal of 6670164521 is 1254610766.

It can be written as a sum of positive squares in 4 ways, for example, as 1155625 + 6669008896 = 1075^2 + 81664^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6670164521 - 2¹⁰ = 6670163497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6670161521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232841 + ... + 259913.

It is an arithmetic number, because the mean of its divisors is an integer number (837195765).

Almost surely, 2^6670164521 is an apocalyptic number.

It is an amenable number.

6670164521 is a deficient number, since it is larger than the sum of its proper divisors (27401599).

6670164521 is a wasteful number, since it uses less digits than its factorization.

6670164521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28075.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 6670164521 is about 81671.0751796497. The cubic root of 6670164521 is about 1882.4011609062.

The spelling of 6670164521 in words is "six billion, six hundred seventy million, one hundred sixty-four thousand, five hundred twenty-one".