1669379906 has 16 divisors (see below), whose sum is σ = 2690944416. Its totient is φ = 773864256.

The previous prime is 1669379879. The next prime is 1669379911. The reversal of 1669379906 is 6099739661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364136 + ... + 368691.

It is an arithmetic number, because the mean of its divisors is an integer number (168184026).

Almost surely, 2^1669379906 is an apocalyptic number.

1669379906 is a deficient number, since it is larger than the sum of its proper divisors (1021564510).

1669379906 is a wasteful number, since it uses less digits than its factorization.

1669379906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732913.

The product of its (nonzero) digits is 3306744, while the sum is 56.

The square root of 1669379906 is about 40858.0457927199. The cubic root of 1669379906 is about 1186.2741328711.

The spelling of 1669379906 in words is "one billion, six hundred sixty-nine million, three hundred seventy-nine thousand, nine hundred six".