166556160526398 has 32 divisors (see below), whose sum is σ = 334633919542272. Its totient is φ = 55265161828800.

The previous prime is 166556160526391. The next prime is 166556160526421. The reversal of 166556160526398 is 893625061655661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166556160526391) 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 15 ways as a sum of consecutive naturals, for example, 10941793 + ... + 21279923.

It is an arithmetic number, because the mean of its divisors is an integer number (10457309985696).

Almost surely, 2^{166556160526398} is an apocalyptic number.

166556160526398 is an abundant number, since it is smaller than the sum of its proper divisors (168077759015874).

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

166556160526398 is a wasteful number, since it uses less digits than its factorization.

166556160526398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10350400.

The product of its (nonzero) digits is 419904000, while the sum is 69.

The spelling of 166556160526398 in words is "one hundred sixty-six trillion, five hundred fifty-six billion, one hundred sixty million, five hundred twenty-six thousand, three hundred ninety-eight".