1600665866 has 16 divisors (see below), whose sum is σ = 2413027584. Its totient is φ = 796331184.

The previous prime is 1600665827. The next prime is 1600665881. The reversal of 1600665866 is 6685660061.

It is a Curzon 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, 670511 + ... + 672893.

It is an arithmetic number, because the mean of its divisors is an integer number (150814224).

Almost surely, 2^1600665866 is an apocalyptic number.

1600665866 is a deficient number, since it is larger than the sum of its proper divisors (812361718).

1600665866 is a wasteful number, since it uses less digits than its factorization.

1600665866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3925.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 1600665866 is about 40008.3224592084. The cubic root of 1600665866 is about 1169.7693231156.

The spelling of 1600665866 in words is "one billion, six hundred million, six hundred sixty-five thousand, eight hundred sixty-six".