66186831042 has 24 divisors (see below), whose sum is σ = 143653358316. Its totient is φ = 22024037376.

The previous prime is 66186831023. The next prime is 66186831083. The reversal of 66186831042 is 24013868166.

It can be written as a sum of positive squares in 2 ways, for example, as 49586827761 + 16600003281 = 222681^2 + 128841^2 .

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 11 ways as a sum of consecutive naturals, for example, 3175963 + ... + 3196734.

Almost surely, 2^66186831042 is an apocalyptic number.

66186831042 is an abundant number, since it is smaller than the sum of its proper divisors (77466527274).

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

66186831042 is a wasteful number, since it uses less digits than its factorization.

66186831042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6373282 (or 6373279 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 66186831042 in words is "sixty-six billion, one hundred eighty-six million, eight hundred thirty-one thousand, forty-two".