66713211 has 6 divisors (see below), whose sum is σ = 96363540. Its totient is φ = 44475468.

The previous prime is 66713177. The next prime is 66713221. The reversal of 66713211 is 11231766.

It is not a de Polignac number, because 66713211 - 2¹³ = 66705019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66713221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3706281 + ... + 3706298.

It is an arithmetic number, because the mean of its divisors is an integer number (16060590).

Almost surely, 2^66713211 is an apocalyptic number.

66713211 is a deficient number, since it is larger than the sum of its proper divisors (29650329).

66713211 is a wasteful number, since it uses less digits than its factorization.

66713211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7412585 (or 7412582 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 66713211 is about 8167.8155586423. The cubic root of 66713211 is about 405.5744750986.

Adding to 66713211 its reverse (11231766), we get a palindrome (77944977).

The spelling of 66713211 in words is "sixty-six million, seven hundred thirteen thousand, two hundred eleven".