166019453855 has 8 divisors (see below), whose sum is σ = 199259752032. Its totient is φ = 132791291488.

The previous prime is 166019453839. The next prime is 166019453903. The reversal of 166019453855 is 558354910661.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 166019453855 - 2⁴ = 166019453839 is a prime.

It is a super-2 number, since 2×166019453855² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166019453797 and 166019453806.

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, 3003827 + ... + 3058596.

It is an arithmetic number, because the mean of its divisors is an integer number (24907469004).

Almost surely, 2^166019453855 is an apocalyptic number.

166019453855 is a deficient number, since it is larger than the sum of its proper divisors (33240298177).

166019453855 is an equidigital number, since it uses as much as digits as its factorization.

166019453855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6067905.

The product of its (nonzero) digits is 3888000, while the sum is 53.

The spelling of 166019453855 in words is "one hundred sixty-six billion, nineteen million, four hundred fifty-three thousand, eight hundred fifty-five".