66303231019 has 4 divisors (see below), whose sum is σ = 68589549360. Its totient is φ = 64016912680.

The previous prime is 66303231013. The next prime is 66303231053. The reversal of 66303231019 is 91013230366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66303231019 - 2³ = 66303231011 is a prime.

It is a super-2 number, since 2×66303231019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66303231011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1143159127 + ... + 1143159184.

It is an arithmetic number, because the mean of its divisors is an integer number (17147387340).

Almost surely, 2^66303231019 is an apocalyptic number.

66303231019 is a deficient number, since it is larger than the sum of its proper divisors (2286318341).

66303231019 is a wasteful number, since it uses less digits than its factorization.

66303231019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286318340.

The product of its (nonzero) digits is 17496, while the sum is 34.

The spelling of 66303231019 in words is "sixty-six billion, three hundred three million, two hundred thirty-one thousand, nineteen".