66447387359 has 16 divisors (see below), whose sum is σ = 67661110272. Its totient is φ = 65242568448.

The previous prime is 66447387341. The next prime is 66447387361. The reversal of 66447387359 is 95378374466.

It is a cyclic number.

It is not a de Polignac number, because 66447387359 - 2⁸ = 66447387103 is a prime.

It is a super-3 number, since 3×66447387359³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66447387319) 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, 17136929 + ... + 17140805.

It is an arithmetic number, because the mean of its divisors is an integer number (4228819392).

Almost surely, 2^66447387359 is an apocalyptic number.

66447387359 is a deficient number, since it is larger than the sum of its proper divisors (1213722913).

66447387359 is a wasteful number, since it uses less digits than its factorization.

66447387359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4946.

The product of its digits is 91445760, while the sum is 62.

The spelling of 66447387359 in words is "sixty-six billion, four hundred forty-seven million, three hundred eighty-seven thousand, three hundred fifty-nine".