666342424243607 has 4 divisors (see below), whose sum is σ = 666799135982040. Its totient is φ = 665885712505176.

The previous prime is 666342424243553. The next prime is 666342424243649. The reversal of 666342424243607 is 706342424243666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 666342424243607 - 2⁴⁸ = 384867447532951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666342424243207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228355867028 + ... + 228355869945.

It is an arithmetic number, because the mean of its divisors is an integer number (166699783995510).

Almost surely, 2^{666342424243607} is an apocalyptic number.

666342424243607 is a deficient number, since it is larger than the sum of its proper divisors (456711738433).

666342424243607 is a wasteful number, since it uses less digits than its factorization.

666342424243607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456711738432.

The product of its (nonzero) digits is 167215104, while the sum is 59.

Adding to 666342424243607 its sum of digits (59), we get a palindrome (666342424243666).

The spelling of 666342424243607 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 seven".