66963319018 has 16 divisors (see below), whose sum is σ = 101125866024. Its totient is φ = 33255460800.

The previous prime is 66963319013. The next prime is 66963319037. The reversal of 66963319018 is 81091336966.

It can be written as a sum of positive squares in 4 ways, for example, as 39351847129 + 27611471889 = 198373^2 + 166167^2 .

It is not an unprimeable number, because it can be changed into a prime (66963319013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15033 + ... + 366268.

Almost surely, 2^66963319018 is an apocalyptic number.

66963319018 is a deficient number, since it is larger than the sum of its proper divisors (34162547006).

66963319018 is a wasteful number, since it uses less digits than its factorization.

66963319018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381897.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The spelling of 66963319018 in words is "sixty-six billion, nine hundred sixty-three million, three hundred nineteen thousand, eighteen".