66155546434 has 8 divisors (see below), whose sum is σ = 99290918160. Its totient is φ = 33058573716.

The previous prime is 66155546411. The next prime is 66155546449. The reversal of 66155546434 is 43464555166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66155546434² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 9595444 + ... + 9602335.

It is an arithmetic number, because the mean of its divisors is an integer number (12411364770).

Almost surely, 2^66155546434 is an apocalyptic number.

66155546434 is a deficient number, since it is larger than the sum of its proper divisors (33135371726).

66155546434 is a wasteful number, since it uses less digits than its factorization.

66155546434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19199504.

The product of its digits is 5184000, while the sum is 49.

The spelling of 66155546434 in words is "sixty-six billion, one hundred fifty-five million, five hundred forty-six thousand, four hundred thirty-four".