166023504366243 has 8 divisors (see below), whose sum is σ = 221378029501008. Its totient is φ = 110675657737824.

The previous prime is 166023504366241. The next prime is 166023504366277. The reversal of 166023504366243 is 342663405320661.

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

It is not a de Polignac number, because 166023504366243 - 2¹ = 166023504366241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166023504366241) 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, 1669568580 + ... + 1669668017.

It is an arithmetic number, because the mean of its divisors is an integer number (27672253687626).

Almost surely, 2^{166023504366243} is an apocalyptic number.

166023504366243 is a deficient number, since it is larger than the sum of its proper divisors (55354525134765).

166023504366243 is a wasteful number, since it uses less digits than its factorization.

166023504366243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339253173.

The product of its (nonzero) digits is 11197440, while the sum is 51.

The spelling of 166023504366243 in words is "one hundred sixty-six trillion, twenty-three billion, five hundred four million, three hundred sixty-six thousand, two hundred forty-three".