166120521159 has 8 divisors (see below), whose sum is σ = 228638996992. Its totient is φ = 107174529720.

The previous prime is 166120521113. The next prime is 166120521169. The reversal of 166120521159 is 951125021661.

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

It is not a de Polignac number, because 166120521159 - 2⁷ = 166120521031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166120521109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 893120989 + ... + 893121174.

It is an arithmetic number, because the mean of its divisors is an integer number (28579874624).

Almost surely, 2^166120521159 is an apocalyptic number.

166120521159 is a deficient number, since it is larger than the sum of its proper divisors (62518475833).

166120521159 is a wasteful number, since it uses less digits than its factorization.

166120521159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786242197.

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 166120521159 in words is "one hundred sixty-six billion, one hundred twenty million, five hundred twenty-one thousand, one hundred fifty-nine".