66511330 has 8 divisors (see below), whose sum is σ = 119720412. Its totient is φ = 26604528.

The previous prime is 66511283. The next prime is 66511363. The reversal of 66511330 is 3311566.

It can be written as a sum of positive squares in 2 ways, for example, as 65820769 + 690561 = 8113^2 + 831^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 66511295 and 66511304.

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, 3325557 + ... + 3325576.

Almost surely, 2^66511330 is an apocalyptic number.

66511330 is a deficient number, since it is larger than the sum of its proper divisors (53209082).

66511330 is a wasteful number, since it uses less digits than its factorization.

66511330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6651140.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 66511330 is about 8155.4478724347. The cubic root of 66511330 is about 405.1649584592.

Adding to 66511330 its reverse (3311566), we get a palindrome (69822896).

The spelling of 66511330 in words is "sixty-six million, five hundred eleven thousand, three hundred thirty".