66550455405566 has 8 divisors (see below), whose sum is σ = 108900745209144. Its totient is φ = 30250207002520.

The previous prime is 66550455405527. The next prime is 66550455405569.

It is a happy number.

66550455405566 is nontrivially palindromic in base 10.

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

It is a super-2 number, since 2×66550455405566² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66550455405499 and 66550455405508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66550455405569) 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, 1512510350105 + ... + 1512510350148.

It is an arithmetic number, because the mean of its divisors is an integer number (13612593151143).

Almost surely, 2^{66550455405566} is an apocalyptic number.

66550455405566 is a deficient number, since it is larger than the sum of its proper divisors (42350289803578).

66550455405566 is a wasteful number, since it uses less digits than its factorization.

66550455405566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3025020700266.

The product of its (nonzero) digits is 324000000, while the sum is 62.

The spelling of 66550455405566 in words is "sixty-six trillion, five hundred fifty billion, four hundred fifty-five million, four hundred five thousand, five hundred sixty-six".