666342424243666 has 8 divisors (see below), whose sum is σ = 1031756011732224. Its totient is φ = 322423753666260.

The previous prime is 666342424243649. The next prime is 666342424243711.

It is a happy number.

666342424243666 is nontrivially palindromic in base 10.

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

It is a super-2 number, since 2×666342424243666² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 666342424243598 and 666342424243607.

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, 5373729227710 + ... + 5373729227833.

It is an arithmetic number, because the mean of its divisors is an integer number (128969501466528).

Almost surely, 2^{666342424243666} is an apocalyptic number.

666342424243666 is a deficient number, since it is larger than the sum of its proper divisors (365413587488558).

666342424243666 is a wasteful number, since it uses less digits than its factorization.

666342424243666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10747458455576.

The product of its digits is 859963392, while the sum is 64.

The spelling of 666342424243666 in words is "six hundred sixty-six trillion, three hundred forty-two billion, four hundred twenty-four million, two hundred forty-three thousand, six hundred sixty-six".