666244603735607 has 8 divisors (see below), whose sum is σ = 759699729146736. Its totient is φ = 578818841254272.

The previous prime is 666244603735589. The next prime is 666244603735609. The reversal of 666244603735607 is 706537306442666.

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

It is a cyclic number.

It is not a de Polignac number, because 666244603735607 - 2²⁶ = 666244536626743 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 (666244603735609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1507340732213 + ... + 1507340732654.

It is an arithmetic number, because the mean of its divisors is an integer number (94962466143342).

Almost surely, 2^{666244603735607} is an apocalyptic number.

666244603735607 is a deficient number, since it is larger than the sum of its proper divisors (93455125411129).

666244603735607 is a wasteful number, since it uses less digits than its factorization.

666244603735607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014681464897.

The product of its (nonzero) digits is 548674560, while the sum is 65.

The spelling of 666244603735607 in words is "six hundred sixty-six trillion, two hundred forty-four billion, six hundred three million, seven hundred thirty-five thousand, six hundred seven".