6636626566442 has 8 divisors (see below), whose sum is σ = 10540524546756. Its totient is φ = 3123118384192.

The previous prime is 6636626566441. The next prime is 6636626566511. The reversal of 6636626566442 is 2446656266366.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6634740488401 + 1886078041 = 2575799^2 + 43429^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6636626566441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97597449473 + ... + 97597449540.

Almost surely, 2^{6636626566442} is an apocalyptic number.

6636626566442 is a deficient number, since it is larger than the sum of its proper divisors (3903897980314).

6636626566442 is a wasteful number, since it uses less digits than its factorization.

6636626566442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195194899032.

The product of its digits is 268738560, while the sum is 62.

The spelling of 6636626566442 in words is "six trillion, six hundred thirty-six billion, six hundred twenty-six million, five hundred sixty-six thousand, four hundred forty-two".