66331155566123 has 8 divisors (see below), whose sum is σ = 75807280366848. Its totient is φ = 56855092123944.

The previous prime is 66331155566051. The next prime is 66331155566129. The reversal of 66331155566123 is 32166555113366.

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 66331155566123 - 2¹⁰ = 66331155565099 is a prime.

It is a super-2 number, since 2×66331155566123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66331155566129) 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, 12999311 + ... + 17367912.

It is an arithmetic number, because the mean of its divisors is an integer number (9475910045856).

Almost surely, 2^{66331155566123} is an apocalyptic number.

66331155566123 is a deficient number, since it is larger than the sum of its proper divisors (9476124800725).

66331155566123 is a wasteful number, since it uses less digits than its factorization.

66331155566123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30679273.

The product of its digits is 8748000, while the sum is 53.

The spelling of 66331155566123 in words is "sixty-six trillion, three hundred thirty-one billion, one hundred fifty-five million, five hundred sixty-six thousand, one hundred twenty-three".