66724563898 has 8 divisors (see below), whose sum is σ = 100112215392. Its totient is φ = 33353825436.

The previous prime is 66724563881. The next prime is 66724563901. The reversal of 66724563898 is 89836542766.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 4218390 + ... + 4234177.

It is an arithmetic number, because the mean of its divisors is an integer number (12514026924).

Almost surely, 2^66724563898 is an apocalyptic number.

66724563898 is a deficient number, since it is larger than the sum of its proper divisors (33387651494).

66724563898 is a wasteful number, since it uses less digits than its factorization.

66724563898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8456516.

The product of its digits is 104509440, while the sum is 64.

The spelling of 66724563898 in words is "sixty-six billion, seven hundred twenty-four million, five hundred sixty-three thousand, eight hundred ninety-eight".