331216066 has 8 divisors (see below), whose sum is σ = 526049100. Its totient is φ = 155866368.

The previous prime is 331216043. The next prime is 331216087. The reversal of 331216066 is 660612133.

It can be written as a sum of positive squares in 2 ways, for example, as 328878225 + 2337841 = 18135^2 + 1529^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4870791 + ... + 4870858.

Almost surely, 2^331216066 is an apocalyptic number.

331216066 is a deficient number, since it is larger than the sum of its proper divisors (194833034).

331216066 is a wasteful number, since it uses less digits than its factorization.

331216066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9741668.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 331216066 is about 18199.3424606495. The cubic root of 331216066 is about 691.8901239449.

Adding to 331216066 its reverse (660612133), we get a palindrome (991828199).

The spelling of 331216066 in words is "three hundred thirty-one million, two hundred sixteen thousand, sixty-six".