33215312066 has 4 divisors (see below), whose sum is σ = 49822968102. Its totient is φ = 16607656032.

The previous prime is 33215312063. The next prime is 33215312107. The reversal of 33215312066 is 66021351233.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28444509025 + 4770803041 = 168655^2 + 69071^2 .

It is a super-2 number, since 2×33215312066² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33215312063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8303828015 + ... + 8303828018.

Almost surely, 2^33215312066 is an apocalyptic number.

33215312066 is a deficient number, since it is larger than the sum of its proper divisors (16607656036).

33215312066 is a wasteful number, since it uses less digits than its factorization.

33215312066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16607656035.

The product of its (nonzero) digits is 19440, while the sum is 32.

Adding to 33215312066 its reverse (66021351233), we get a palindrome (99236663299).

The spelling of 33215312066 in words is "thirty-three billion, two hundred fifteen million, three hundred twelve thousand, sixty-six".