66527213 has 4 divisors (see below), whose sum is σ = 67464288. Its totient is φ = 65590140.

The previous prime is 66527203. The next prime is 66527257. The reversal of 66527213 is 31272566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66527213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66527213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66527203) 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, 468431 + ... + 468572.

It is an arithmetic number, because the mean of its divisors is an integer number (16866072).

Almost surely, 2^66527213 is an apocalyptic number.

It is an amenable number.

66527213 is a deficient number, since it is larger than the sum of its proper divisors (937075).

66527213 is an equidigital number, since it uses as much as digits as its factorization.

66527213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937074.

The product of its digits is 15120, while the sum is 32.

The square root of 66527213 is about 8156.4215805707. The cubic root of 66527213 is about 405.1972072146.

Adding to 66527213 its reverse (31272566), we get a palindrome (97799779).

The spelling of 66527213 in words is "sixty-six million, five hundred twenty-seven thousand, two hundred thirteen".