1666045063 has 2 divisors, whose sum is σ = 1666045064. Its totient is φ = 1666045062.

The previous prime is 1666045037. The next prime is 1666045111. The reversal of 1666045063 is 3605406661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1666045063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1666025063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833022531 + 833022532.

It is an arithmetic number, because the mean of its divisors is an integer number (833022532).

Almost surely, 2^1666045063 is an apocalyptic number.

1666045063 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666045063 is an equidigital number, since it uses as much as digits as its factorization.

1666045063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 1666045063 is about 40817.2152773802. The cubic root of 1666045063 is about 1185.4836846402.

The spelling of 1666045063 in words is "one billion, six hundred sixty-six million, forty-five thousand, sixty-three".