66708013 has 8 divisors (see below), whose sum is σ = 67687200. Its totient is φ = 65733168.

The previous prime is 66707999. The next prime is 66708029. The reversal of 66708013 is 31080766.

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 66708013 - 2¹³ = 66699821 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 (66708043) 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, 41458 + ... + 43036.

It is an arithmetic number, because the mean of its divisors is an integer number (8460900).

Almost surely, 2^66708013 is an apocalyptic number.

It is an amenable number.

66708013 is a deficient number, since it is larger than the sum of its proper divisors (979187).

66708013 is a wasteful number, since it uses less digits than its factorization.

66708013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 66708013 is about 8167.4973523106. The cubic root of 66708013 is about 405.5639412985.

Adding to 66708013 its reverse (31080766), we get a palindrome (97788779).

The spelling of 66708013 in words is "sixty-six million, seven hundred eight thousand, thirteen".