1666063403 has 2 divisors, whose sum is σ = 1666063404. Its totient is φ = 1666063402.

The previous prime is 1666063361. The next prime is 1666063459. The reversal of 1666063403 is 3043606661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1666063403 - 2¹⁶ = 1665997867 is a prime.

It is not a weakly prime, because it can be changed into another prime (1666063463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833031701 + 833031702.

It is an arithmetic number, because the mean of its divisors is an integer number (833031702).

Almost surely, 2^1666063403 is an apocalyptic number.

1666063403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666063403 is an equidigital number, since it uses as much as digits as its factorization.

1666063403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 1666063403 is about 40817.4399368701. The cubic root of 1666063403 is about 1185.4880346008.

The spelling of 1666063403 in words is "one billion, six hundred sixty-six million, sixty-three thousand, four hundred three".