6670539613 has 4 divisors (see below), whose sum is σ = 6672613788. Its totient is φ = 6668465440.

The previous prime is 6670539593. The next prime is 6670539641. The reversal of 6670539613 is 3169350766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4550581764 + 2119957849 = 67458^2 + 46043^2 .

It is a cyclic number.

It is not a de Polignac number, because 6670539613 - 2²⁹ = 6133668701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6670539653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1032256 + ... + 1038697.

It is an arithmetic number, because the mean of its divisors is an integer number (1668153447).

Almost surely, 2^6670539613 is an apocalyptic number.

It is an amenable number.

6670539613 is a deficient number, since it is larger than the sum of its proper divisors (2074175).

6670539613 is a wasteful number, since it uses less digits than its factorization.

6670539613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074174.

The product of its (nonzero) digits is 612360, while the sum is 46.

The square root of 6670539613 is about 81673.3715050383. The cubic root of 6670539613 is about 1882.4364454122.

The spelling of 6670539613 in words is "six billion, six hundred seventy million, five hundred thirty-nine thousand, six hundred thirteen".