66234232220 has 24 divisors (see below), whose sum is σ = 149791264224. Its totient is φ = 24455716416.

The previous prime is 66234232187. The next prime is 66234232241. The reversal of 66234232220 is 2223243266.

It is a super-2 number, since 2×66234232220² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127373264 + ... + 127373783.

It is an arithmetic number, because the mean of its divisors is an integer number (6241302676).

Almost surely, 2^66234232220 is an apocalyptic number.

It is an amenable number.

66234232220 is an abundant number, since it is smaller than the sum of its proper divisors (83557032004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66234232220 is a wasteful number, since it uses less digits than its factorization.

66234232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254747069 (or 254747067 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 66234232220 its reverse (2223243266), we get a palindrome (68457475486).

The spelling of 66234232220 in words is "sixty-six billion, two hundred thirty-four million, two hundred thirty-two thousand, two hundred twenty".