66624242666 has 16 divisors (see below), whose sum is σ = 108066358656. Its totient is φ = 30685507776.

The previous prime is 66624242603. The next prime is 66624242681.

66624242666 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20844536 + ... + 20847731.

It is an arithmetic number, because the mean of its divisors is an integer number (6754147416).

Almost surely, 2^66624242666 is an apocalyptic number.

66624242666 is a deficient number, since it is larger than the sum of its proper divisors (41442115990).

66624242666 is a wasteful number, since it uses less digits than its factorization.

66624242666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41692333.

The product of its digits is 5971968, while the sum is 50.

The spelling of 66624242666 in words is "sixty-six billion, six hundred twenty-four million, two hundred forty-two thousand, six hundred sixty-six".