66303231018 has 16 divisors (see below), whose sum is σ = 133560467040. Its totient is φ = 21942076176.

The previous prime is 66303231013. The next prime is 66303231053. The reversal of 66303231018 is 81013230366.

It is a super-2 number, since 2×66303231018² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66303231018.

It is not an unprimeable number, because it can be changed into a prime (66303231011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39749305 + ... + 39750972.

It is an arithmetic number, because the mean of its divisors is an integer number (8347529190).

Almost surely, 2^66303231018 is an apocalyptic number.

66303231018 is an abundant number, since it is smaller than the sum of its proper divisors (67257236022).

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

66303231018 is a wasteful number, since it uses less digits than its factorization.

66303231018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79500421.

The product of its (nonzero) digits is 15552, while the sum is 33.

The spelling of 66303231018 in words is "sixty-six billion, three hundred three million, two hundred thirty-one thousand, eighteen".