6666570013 has 4 divisors (see below), whose sum is σ = 6775858108. Its totient is φ = 6557281920.

The previous prime is 6666570011. The next prime is 6666570023. The reversal of 6666570013 is 3100756666.

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 437730084 + 6228839929 = 20922^2 + 78923^2 .

It is a cyclic number.

It is not a de Polignac number, because 6666570013 - 2¹ = 6666570011 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 (6666570011) 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, 54643956 + ... + 54644077.

It is an arithmetic number, because the mean of its divisors is an integer number (1693964527).

Almost surely, 2^6666570013 is an apocalyptic number.

It is an amenable number.

6666570013 is a deficient number, since it is larger than the sum of its proper divisors (109288095).

6666570013 is a wasteful number, since it uses less digits than its factorization.

6666570013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109288094.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 6666570013 is about 81649.0662102146. The cubic root of 6666570013 is about 1882.0629622598.

The spelling of 6666570013 in words is "six billion, six hundred sixty-six million, five hundred seventy thousand, thirteen".