66215330 has 8 divisors (see below), whose sum is σ = 119187612. Its totient is φ = 26486128.

The previous prime is 66215329. The next prime is 66215341. The reversal of 66215330 is 3351266.

It can be written as a sum of positive squares in 2 ways, for example, as 66080641 + 134689 = 8129^2 + 367^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 66215330.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3310757 + ... + 3310776.

Almost surely, 2^66215330 is an apocalyptic number.

66215330 is a deficient number, since it is larger than the sum of its proper divisors (52972282).

66215330 is a wasteful number, since it uses less digits than its factorization.

66215330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6621540.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 66215330 is about 8137.2802581698. The cubic root of 66215330 is about 404.5630200221.

Adding to 66215330 its reverse (3351266), we get a palindrome (69566596).

The spelling of 66215330 in words is "sixty-six million, two hundred fifteen thousand, three hundred thirty".