166537129 has 8 divisors (see below), whose sum is σ = 182031840. Its totient is φ = 151101600.

The previous prime is 166537087. The next prime is 166537139. The reversal of 166537129 is 921735661.

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

It is a cyclic number.

It is not a de Polignac number, because 166537129 - 2⁷ = 166537001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166537091 and 166537100.

It is not an unprimeable number, because it can be changed into a prime (166537139) 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, 8799 + ... + 20260.

It is an arithmetic number, because the mean of its divisors is an integer number (22753980).

Almost surely, 2^166537129 is an apocalyptic number.

It is an amenable number.

166537129 is a deficient number, since it is larger than the sum of its proper divisors (15494711).

166537129 is a wasteful number, since it uses less digits than its factorization.

166537129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29591.

The product of its digits is 68040, while the sum is 40.

The square root of 166537129 is about 12904.9265398917. The cubic root of 166537129 is about 550.1785965451.

The spelling of 166537129 in words is "one hundred sixty-six million, five hundred thirty-seven thousand, one hundred twenty-nine".