66564457343 has 8 divisors (see below), whose sum is σ = 70174634208. Its totient is φ = 63013953024.

The previous prime is 66564457327. The next prime is 66564457357. The reversal of 66564457343 is 34375446566.

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

It is not a de Polignac number, because 66564457343 - 2⁴ = 66564457327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66564457243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14915846 + ... + 14920307.

It is an arithmetic number, because the mean of its divisors is an integer number (8771829276).

Almost surely, 2^66564457343 is an apocalyptic number.

66564457343 is a deficient number, since it is larger than the sum of its proper divisors (3610176865).

66564457343 is a wasteful number, since it uses less digits than its factorization.

66564457343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29836273.

The product of its digits is 21772800, while the sum is 53.

The spelling of 66564457343 in words is "sixty-six billion, five hundred sixty-four million, four hundred fifty-seven thousand, three hundred forty-three".