1666845306 has 48 divisors (see below), whose sum is σ = 4129766784. Its totient is φ = 475971552.

The previous prime is 1666845287. The next prime is 1666845307. The reversal of 1666845306 is 6035486661.

It is not an unprimeable number, because it can be changed into a prime (1666845307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 355131 + ... + 359793.

It is an arithmetic number, because the mean of its divisors is an integer number (86036808).

Almost surely, 2^1666845306 is an apocalyptic number.

1666845306 is an abundant number, since it is smaller than the sum of its proper divisors (2462921478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666845306 is a wasteful number, since it uses less digits than its factorization.

1666845306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7515 (or 7512 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 1666845306 is about 40827.0168638366. The cubic root of 1666845306 is about 1185.6734600533.

The spelling of 1666845306 in words is "one billion, six hundred sixty-six million, eight hundred forty-five thousand, three hundred six".