66752213 has 8 divisors (see below), whose sum is σ = 73542816. Its totient is φ = 60082000.

The previous prime is 66752201. The next prime is 66752219. The reversal of 66752213 is 31225766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66752213 - 2⁴ = 66752197 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 66752213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66752219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28931 + ... + 31152.

It is an arithmetic number, because the mean of its divisors is an integer number (9192852).

Almost surely, 2^66752213 is an apocalyptic number.

It is an amenable number.

66752213 is a deficient number, since it is larger than the sum of its proper divisors (6790603).

66752213 is a wasteful number, since it uses less digits than its factorization.

66752213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60195.

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

The square root of 66752213 is about 8170.2027514622. The cubic root of 66752213 is about 405.6534955998.

Adding to 66752213 its reverse (31225766), we get a palindrome (97977979).

It can be divided in two parts, 6675 and 2213, that added together give a palindrome (8888).

The spelling of 66752213 in words is "sixty-six million, seven hundred fifty-two thousand, two hundred thirteen".