66693247268 has 24 divisors (see below), whose sum is σ = 118998843768. Its totient is φ = 32694461696.

The previous prime is 66693247219. The next prime is 66693247297. The reversal of 66693247268 is 86274239666.

It can be written as a sum of positive squares in 4 ways, for example, as 47124594724 + 19568652544 = 217082^2 + 139888^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194030 + ... + 413562.

It is an arithmetic number, because the mean of its divisors is an integer number (4958285157).

Almost surely, 2^66693247268 is an apocalyptic number.

It is an amenable number.

66693247268 is a deficient number, since it is larger than the sum of its proper divisors (52305596500).

66693247268 is a wasteful number, since it uses less digits than its factorization.

66693247268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221023 (or 221021 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 59.

The spelling of 66693247268 in words is "sixty-six billion, six hundred ninety-three million, two hundred forty-seven thousand, two hundred sixty-eight".