66201623963 has 2 divisors, whose sum is σ = 66201623964. Its totient is φ = 66201623962.

The previous prime is 66201623959. The next prime is 66201624059. The reversal of 66201623963 is 36932610266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66201623963 - 2² = 66201623959 is a prime.

It is not a weakly prime, because it can be changed into another prime (66201626963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33100811981 + 33100811982.

It is an arithmetic number, because the mean of its divisors is an integer number (33100811982).

Almost surely, 2^66201623963 is an apocalyptic number.

66201623963 is a deficient number, since it is larger than the sum of its proper divisors (1).

66201623963 is an equidigital number, since it uses as much as digits as its factorization.

66201623963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 44.

The spelling of 66201623963 in words is "sixty-six billion, two hundred one million, six hundred twenty-three thousand, nine hundred sixty-three".