66624355342666 has 16 divisors (see below), whose sum is σ = 109022024901600. Its totient is φ = 30283699960080.

The previous prime is 66624355342637. The next prime is 66624355342751.

66624355342666 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66624355342598 and 66624355342607.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2297080 + ... + 11769676.

It is an arithmetic number, because the mean of its divisors is an integer number (6813876556350).

Almost surely, 2^{66624355342666} is an apocalyptic number.

66624355342666 is a deficient number, since it is larger than the sum of its proper divisors (42397669558934).

66624355342666 is a wasteful number, since it uses less digits than its factorization.

66624355342666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9792309.

The product of its digits is 671846400, while the sum is 64.

The spelling of 66624355342666 in words is "sixty-six trillion, six hundred twenty-four billion, three hundred fifty-five million, three hundred forty-two thousand, six hundred sixty-six".