666243123155633 has 8 divisors (see below), whose sum is σ = 701377353852000. Its totient is φ = 631115772775488.

The previous prime is 666243123155609. The next prime is 666243123155641. The reversal of 666243123155633 is 336551321342666.

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 666243123155633 - 2²⁴ = 666243106378417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666243123155683) 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, 1719880283 + ... + 1720267616.

It is an arithmetic number, because the mean of its divisors is an integer number (87672169231500).

Almost surely, 2^{666243123155633} is an apocalyptic number.

It is an amenable number.

666243123155633 is a deficient number, since it is larger than the sum of its proper divisors (35134230696367).

666243123155633 is a wasteful number, since it uses less digits than its factorization.

666243123155633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440158111.

The product of its digits is 41990400, while the sum is 56.

The spelling of 666243123155633 in words is "six hundred sixty-six trillion, two hundred forty-three billion, one hundred twenty-three million, one hundred fifty-five thousand, six hundred thirty-three".