66468698 has 4 divisors (see below), whose sum is σ = 99703050. Its totient is φ = 33234348.

The previous prime is 66468697. The next prime is 66468713. The reversal of 66468698 is 89686466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89686466 = 2 ⋅44843233.

It can be written as a sum of positive squares in only one way, i.e., 56055169 + 10413529 = 7487^2 + 3227^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66468697) by changing a digit.

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 as a sum of consecutive naturals, namely, 16617173 + ... + 16617176.

Almost surely, 2^66468698 is an apocalyptic number.

66468698 is a deficient number, since it is larger than the sum of its proper divisors (33234352).

66468698 is a wasteful number, since it uses less digits than its factorization.

66468698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33234351.

The product of its digits is 2985984, while the sum is 53.

The square root of 66468698 is about 8152.8337404856. The cubic root of 66468698 is about 405.0783732897.

The spelling of 66468698 in words is "sixty-six million, four hundred sixty-eight thousand, six hundred ninety-eight".