166643153 has 16 divisors (see below), whose sum is σ = 177146880. Its totient is φ = 156551616.

The previous prime is 166643149. The next prime is 166643173. The reversal of 166643153 is 351346661.

It is a cyclic number.

It is not a de Polignac number, because 166643153 - 2² = 166643149 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166643123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136775 + ... + 137987.

It is an arithmetic number, because the mean of its divisors is an integer number (11071680).

Almost surely, 2^166643153 is an apocalyptic number.

It is an amenable number.

166643153 is a deficient number, since it is larger than the sum of its proper divisors (10503727).

166643153 is a wasteful number, since it uses less digits than its factorization.

166643153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376.

The product of its digits is 38880, while the sum is 35.

The square root of 166643153 is about 12909.0337748416. The cubic root of 166643153 is about 550.2953267930.

The spelling of 166643153 in words is "one hundred sixty-six million, six hundred forty-three thousand, one hundred fifty-three".