66550584676 has 9 divisors (see below), whose sum is σ = 116464426099. Its totient is φ = 33275034364.

The previous prime is 66550584673. The next prime is 66550584679. The reversal of 66550584676 is 67648505566.

The square root of 66550584676 is 257974.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (66550584673) and next prime (66550584679).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66550584676.

It is not an unprimeable number, because it can be changed into a prime (66550584673) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 451455 + ... + 580441.

Almost surely, 2^66550584676 is an apocalyptic number.

66550584676 is the 257974-th square number.

It is an amenable number.

66550584676 is a deficient number, since it is larger than the sum of its proper divisors (49913841423).

66550584676 is an frugal number, since it uses more digits than its factorization.

66550584676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257978 (or 128989 counting only the distinct ones).

The product of its (nonzero) digits is 36288000, while the sum is 58.

The spelling of 66550584676 in words is "sixty-six billion, five hundred fifty million, five hundred eighty-four thousand, six hundred seventy-six".