129668165 has 16 divisors (see below), whose sum is σ = 174337920. Its totient is φ = 91753920.

The previous prime is 129668153. The next prime is 129668183. The reversal of 129668165 is 561866921.

It is not a de Polignac number, because 129668165 - 2¹² = 129664069 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29825 + ... + 33894.

It is an arithmetic number, because the mean of its divisors is an integer number (10896120).

Almost surely, 2^129668165 is an apocalyptic number.

It is an amenable number.

129668165 is a deficient number, since it is larger than the sum of its proper divisors (44669755).

129668165 is a wasteful number, since it uses less digits than its factorization.

129668165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63772.

The product of its digits is 155520, while the sum is 44.

The square root of 129668165 is about 11387.1930255002. The cubic root of 129668165 is about 506.1483067596.

The spelling of 129668165 in words is "one hundred twenty-nine million, six hundred sixty-eight thousand, one hundred sixty-five".