166552315557 has 8 divisors (see below), whose sum is σ = 224359133376. Its totient is φ = 109890187392.

The previous prime is 166552315519. The next prime is 166552315609. The reversal of 166552315557 is 755513255661.

166552315557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 166552315557 - 2³² = 162257348261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166552315157) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 286172073 + ... + 286172654.

It is an arithmetic number, because the mean of its divisors is an integer number (28044891672).

Almost surely, 2^166552315557 is an apocalyptic number.

It is an amenable number.

166552315557 is a deficient number, since it is larger than the sum of its proper divisors (57806817819).

166552315557 is an equidigital number, since it uses as much as digits as its factorization.

166552315557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572344827.

The product of its digits is 4725000, while the sum is 51.

The spelling of 166552315557 in words is "one hundred sixty-six billion, five hundred fifty-two million, three hundred fifteen thousand, five hundred fifty-seven".