16669129 has 8 divisors (see below), whose sum is σ = 18127368. Its totient is φ = 15264000.

The previous prime is 16669109. The next prime is 16669151. The reversal of 16669129 is 92196661.

It can be written as a sum of positive squares in 4 ways, for example, as 6734025 + 9935104 = 2595^2 + 3152^2 .

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 16669129 - 2⁵ = 16669097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16669091 and 16669100.

It is not an unprimeable number, because it can be changed into a prime (16669109) 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, 12622 + ... + 13879.

It is an arithmetic number, because the mean of its divisors is an integer number (2265921).

Almost surely, 2^16669129 is an apocalyptic number.

It is an amenable number.

16669129 is a deficient number, since it is larger than the sum of its proper divisors (1458239).

16669129 is a wasteful number, since it uses less digits than its factorization.

16669129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26555.

The product of its digits is 34992, while the sum is 40.

The square root of 16669129 is about 4082.7844665130. The cubic root of 16669129 is about 255.4490562401.

The spelling of 16669129 in words is "sixteen million, six hundred sixty-nine thousand, one hundred twenty-nine".