66655500567 has 8 divisors (see below), whose sum is σ = 89029649280. Its totient is φ = 44359176120.

The previous prime is 66655500529. The next prime is 66655500581. The reversal of 66655500567 is 76500555666.

It is a happy number.

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

It is not a de Polignac number, because 66655500567 - 2¹² = 66655496471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66655510567) 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, 19454067 + ... + 19457492.

It is an arithmetic number, because the mean of its divisors is an integer number (11128706160).

Almost surely, 2^66655500567 is an apocalyptic number.

66655500567 is a deficient number, since it is larger than the sum of its proper divisors (22374148713).

66655500567 is a wasteful number, since it uses less digits than its factorization.

66655500567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38912133.

The product of its (nonzero) digits is 5670000, while the sum is 51.

The spelling of 66655500567 in words is "sixty-six billion, six hundred fifty-five million, five hundred thousand, five hundred sixty-seven".