1669395165 has 32 divisors (see below), whose sum is σ = 2702650752. Its totient is φ = 879840000.

The previous prime is 1669395137. The next prime is 1669395173. The reversal of 1669395165 is 5615939661.

It is a happy number.

It is not a de Polignac number, because 1669395165 - 2¹⁰ = 1669394141 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1425030 + ... + 1426200.

It is an arithmetic number, because the mean of its divisors is an integer number (84457836).

Almost surely, 2^1669395165 is an apocalyptic number.

1669395165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1669395165 is a deficient number, since it is larger than the sum of its proper divisors (1033255587).

1669395165 is a wasteful number, since it uses less digits than its factorization.

1669395165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221.

The product of its digits is 1312200, while the sum is 51.

The square root of 1669395165 is about 40858.2325241805. The cubic root of 1669395165 is about 1186.2777472475.

The spelling of 1669395165 in words is "one billion, six hundred sixty-nine million, three hundred ninety-five thousand, one hundred sixty-five".