66542355324566 has 8 divisors (see below), whose sum is σ = 108887490531144. Its totient is φ = 30246525147520.

The previous prime is 66542355324451. The next prime is 66542355324649.

It is a happy number.

66542355324566 is nontrivially palindromic in base 10.

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

It is a junction number, because it is equal to n+sod(n) for n = 66542355324499 and 66542355324508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1512326257355 + ... + 1512326257398.

It is an arithmetic number, because the mean of its divisors is an integer number (13610936316393).

Almost surely, 2^{66542355324566} is an apocalyptic number.

66542355324566 is a deficient number, since it is larger than the sum of its proper divisors (42345135206578).

66542355324566 is a wasteful number, since it uses less digits than its factorization.

66542355324566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024652514766.

The product of its digits is 466560000, while the sum is 62.

The spelling of 66542355324566 in words is "sixty-six trillion, five hundred forty-two billion, three hundred fifty-five million, three hundred twenty-four thousand, five hundred sixty-six".