66684237285 has 16 divisors (see below), whose sum is σ = 106703541504. Its totient is φ = 35562005952.

The previous prime is 66684237233. The next prime is 66684237289. The reversal of 66684237285 is 58273248666.

It is not a de Polignac number, because 66684237285 - 2⁸ = 66684237029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66684237289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12964 + ... + 365426.

It is an arithmetic number, because the mean of its divisors is an integer number (6668971344).

Almost surely, 2^66684237285 is an apocalyptic number.

It is an amenable number.

66684237285 is a deficient number, since it is larger than the sum of its proper divisors (40019304219).

66684237285 is a wasteful number, since it uses less digits than its factorization.

66684237285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365084.

The product of its digits is 23224320, while the sum is 57.

The spelling of 66684237285 in words is "sixty-six billion, six hundred eighty-four million, two hundred thirty-seven thousand, two hundred eighty-five".