666243724347507 has 8 divisors (see below), whose sum is σ = 889014124037520. Its totient is φ = 443817903777920.

The previous prime is 666243724347473. The next prime is 666243724347521. The reversal of 666243724347507 is 705743427342666.

666243724347507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 666243724347507 - 2¹⁴ = 666243724331123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666243724347547) 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, 86144775594 + ... + 86144783327.

It is an arithmetic number, because the mean of its divisors is an integer number (111126765504690).

Almost surely, 2^{666243724347507} is an apocalyptic number.

666243724347507 is a deficient number, since it is larger than the sum of its proper divisors (222770399690013).

666243724347507 is a wasteful number, since it uses less digits than its factorization.

666243724347507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172289560213.

The product of its (nonzero) digits is 853493760, while the sum is 66.

The spelling of 666243724347507 in words is "six hundred sixty-six trillion, two hundred forty-three billion, seven hundred twenty-four million, three hundred forty-seven thousand, five hundred seven".