1669307966 has 16 divisors (see below), whose sum is σ = 2640839760. Its totient is φ = 789197760.

The previous prime is 1669307957. The next prime is 1669307971. The reversal of 1669307966 is 6697039661.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22361 + ... + 61956.

It is an arithmetic number, because the mean of its divisors is an integer number (165052485).

Almost surely, 2^1669307966 is an apocalyptic number.

1669307966 is a deficient number, since it is larger than the sum of its proper divisors (971531794).

1669307966 is a wasteful number, since it uses less digits than its factorization.

1669307966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84859.

The product of its (nonzero) digits is 2204496, while the sum is 53.

The square root of 1669307966 is about 40857.1654180757. The cubic root of 1669307966 is about 1186.2570922549.

The spelling of 1669307966 in words is "one billion, six hundred sixty-nine million, three hundred seven thousand, nine hundred sixty-six".