1866316063 has 2 divisors, whose sum is σ = 1866316064. Its totient is φ = 1866316062.

The previous prime is 1866316061. The next prime is 1866316069. The reversal of 1866316063 is 3606136681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1866316063 - 2¹ = 1866316061 is a prime.

Together with 1866316061, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1866316061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 933158031 + 933158032.

It is an arithmetic number, because the mean of its divisors is an integer number (933158032).

Almost surely, 2^1866316063 is an apocalyptic number.

1866316063 is a deficient number, since it is larger than the sum of its proper divisors (1).

1866316063 is an equidigital number, since it uses as much as digits as its factorization.

1866316063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 1866316063 is about 43200.8803498262. The cubic root of 1866316063 is about 1231.1994079618.

The spelling of 1866316063 in words is "one billion, eight hundred sixty-six million, three hundred sixteen thousand, sixty-three".