66131258226 has 16 divisors (see below), whose sum is σ = 144286381728. Its totient is φ = 20039775200.

The previous prime is 66131258189. The next prime is 66131258227. The reversal of 66131258226 is 62285213166.

It is not an unprimeable number, because it can be changed into a prime (66131258227) by changing a digit.

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, 500994315 + ... + 500994446.

It is an arithmetic number, because the mean of its divisors is an integer number (9017898858).

Almost surely, 2^66131258226 is an apocalyptic number.

66131258226 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66131258226 is an abundant number, since it is smaller than the sum of its proper divisors (78155123502).

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

66131258226 is a wasteful number, since it uses less digits than its factorization.

66131258226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001988777.

The product of its digits is 207360, while the sum is 42.

The spelling of 66131258226 in words is "sixty-six billion, one hundred thirty-one million, two hundred fifty-eight thousand, two hundred twenty-six".