66485728994 has 8 divisors (see below), whose sum is σ = 99769356288. Its totient is φ = 33229276900.

The previous prime is 66485728993. The next prime is 66485729071. The reversal of 66485728994 is 49982758466.

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

It is a super-2 number, since 2×66485728994² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66485728993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6787682 + ... + 6797469.

It is an arithmetic number, because the mean of its divisors is an integer number (12471169536).

Almost surely, 2^66485728994 is an apocalyptic number.

66485728994 is a deficient number, since it is larger than the sum of its proper divisors (33283627294).

66485728994 is a wasteful number, since it uses less digits than its factorization.

66485728994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13587600.

The product of its digits is 209018880, while the sum is 68.

It can be divided in two parts, 6648572 and 8994, that added together give a palindrome (6657566).

The spelling of 66485728994 in words is "sixty-six billion, four hundred eighty-five million, seven hundred twenty-eight thousand, nine hundred ninety-four".