66203818412 has 12 divisors (see below), whose sum is σ = 118551023976. Its totient is φ = 32332097280.

The previous prime is 66203818409. The next prime is 66203818423. The reversal of 66203818412 is 21481830266.

66203818412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 66203818412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192452789 + ... + 192453132.

It is an arithmetic number, because the mean of its divisors is an integer number (9879251998).

Almost surely, 2^66203818412 is an apocalyptic number.

It is an amenable number.

66203818412 is a deficient number, since it is larger than the sum of its proper divisors (52347205564).

66203818412 is a wasteful number, since it uses less digits than its factorization.

66203818412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384905968 (or 384905966 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 66203818412 in words is "sixty-six billion, two hundred three million, eight hundred eighteen thousand, four hundred twelve".