666351024442 has 8 divisors (see below), whose sum is σ = 999530065332. Its totient is φ = 333174336000.

The previous prime is 666351024413. The next prime is 666351024463. The reversal of 666351024442 is 244420153666.

It can be written as a sum of positive squares in 2 ways, for example, as 600158540601 + 66192483841 = 774699^2 + 257279^2 .

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

It is a super-2 number, since 2×666351024442² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600442 + ... + 1301242.

Almost surely, 2^666351024442 is an apocalyptic number.

666351024442 is a deficient number, since it is larger than the sum of its proper divisors (333179040890).

666351024442 is a wasteful number, since it uses less digits than its factorization.

666351024442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176224.

The product of its (nonzero) digits is 829440, while the sum is 43.

The spelling of 666351024442 in words is "six hundred sixty-six billion, three hundred fifty-one million, twenty-four thousand, four hundred forty-two".