1669995129 has 16 divisors (see below), whose sum is σ = 2445393600. Its totient is φ = 1005322560.

The previous prime is 1669995127. The next prime is 1669995137. The reversal of 1669995129 is 9215999661.

It is not a de Polignac number, because 1669995129 - 2¹ = 1669995127 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1669995121) 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, 164902 + ... + 174735.

It is an arithmetic number, because the mean of its divisors is an integer number (152837100).

Almost surely, 2^1669995129 is an apocalyptic number.

It is an amenable number.

1669995129 is a deficient number, since it is larger than the sum of its proper divisors (775398471).

1669995129 is a wasteful number, since it uses less digits than its factorization.

1669995129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339800.

The product of its digits is 2361960, while the sum is 57.

The square root of 1669995129 is about 40865.5738856069. The cubic root of 1669995129 is about 1186.4198423631.

The spelling of 1669995129 in words is "one billion, six hundred sixty-nine million, nine hundred ninety-five thousand, one hundred twenty-nine".