66201863 has 24 divisors (see below), whose sum is σ = 82850688. Its totient is φ = 51790752.

The previous prime is 66201857. The next prime is 66201869. The reversal of 66201863 is 36810266.

66201863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66201857) and next prime (66201869).

It is not a de Polignac number, because 66201863 - 2²² = 62007559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66201869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126320 + ... + 126842.

It is an arithmetic number, because the mean of its divisors is an integer number (3452112).

Almost surely, 2^66201863 is an apocalyptic number.

66201863 is a deficient number, since it is larger than the sum of its proper divisors (16648825).

66201863 is a wasteful number, since it uses less digits than its factorization.

66201863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 66201863 is about 8136.4527283086. The cubic root of 66201863 is about 404.5355912298.

The spelling of 66201863 in words is "sixty-six million, two hundred one thousand, eight hundred sixty-three".