1669145907 has 48 divisors (see below), whose sum is σ = 2679049728. Its totient is φ = 916007040.

The previous prime is 1669145899. The next prime is 1669145911. The reversal of 1669145907 is 7095419661.

It is a happy number.

It is not a de Polignac number, because 1669145907 - 2³ = 1669145899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1669145977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 292758 + ... + 298404.

It is an arithmetic number, because the mean of its divisors is an integer number (55813536).

Almost surely, 2^1669145907 is an apocalyptic number.

1669145907 is a deficient number, since it is larger than the sum of its proper divisors (1009903821).

1669145907 is a wasteful number, since it uses less digits than its factorization.

1669145907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5740 (or 5727 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 1669145907 is about 40855.1821315240. The cubic root of 1669145907 is about 1186.2187031213.

The spelling of 1669145907 in words is "one billion, six hundred sixty-nine million, one hundred forty-five thousand, nine hundred seven".