66601818627 has 8 divisors (see below), whose sum is σ = 88929107280. Its totient is φ = 44337871200.

The previous prime is 66601818617. The next prime is 66601818659. The reversal of 66601818627 is 72681810666.

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

It is not a de Polignac number, because 66601818627 - 2¹¹ = 66601816579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66601818627.

It is not an unprimeable number, because it can be changed into a prime (66601818607) 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, 15832852 + ... + 15837057.

It is an arithmetic number, because the mean of its divisors is an integer number (11116138410).

Almost surely, 2^66601818627 is an apocalyptic number.

66601818627 is a deficient number, since it is larger than the sum of its proper divisors (22327288653).

66601818627 is a wasteful number, since it uses less digits than its factorization.

66601818627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31670613.

The product of its (nonzero) digits is 1161216, while the sum is 51.

The spelling of 66601818627 in words is "sixty-six billion, six hundred one million, eight hundred eighteen thousand, six hundred twenty-seven".