666034721623267 has 8 divisors (see below), whose sum is σ = 666164262197952. Its totient is φ = 665905182921000.

The previous prime is 666034721623247. The next prime is 666034721623351. The reversal of 666034721623267 is 762326127430666.

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 666034721623267 - 2¹¹ = 666034721621219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666034721623247) 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, 865888392 + ... + 866657242.

It is an arithmetic number, because the mean of its divisors is an integer number (83270532774744).

Almost surely, 2^{666034721623267} is an apocalyptic number.

666034721623267 is a deficient number, since it is larger than the sum of its proper divisors (129540574685).

666034721623267 is a wasteful number, since it uses less digits than its factorization.

666034721623267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936209.

The product of its (nonzero) digits is 109734912, while the sum is 61.

The spelling of 666034721623267 in words is "six hundred sixty-six trillion, thirty-four billion, seven hundred twenty-one million, six hundred twenty-three thousand, two hundred sixty-seven".