66616288038 has 48 divisors (see below), whose sum is σ = 146952029952. Its totient is φ = 21805350000.

The previous prime is 66616288001. The next prime is 66616288097. The reversal of 66616288038 is 83088261666.

66616288038 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216943 + ... + 424613.

It is an arithmetic number, because the mean of its divisors is an integer number (3061500624).

Almost surely, 2^66616288038 is an apocalyptic number.

66616288038 is an abundant number, since it is smaller than the sum of its proper divisors (80335741914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66616288038 is a wasteful number, since it uses less digits than its factorization.

66616288038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208001 (or 207998 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

It can be divided in two parts, 6661628 and 8038, that added together give a palindrome (6669666).

The spelling of 66616288038 in words is "sixty-six billion, six hundred sixteen million, two hundred eighty-eight thousand, thirty-eight".