66145126116123 has 24 divisors (see below), whose sum is σ = 95715238692528. Its totient is φ = 44017248172032.

The previous prime is 66145126116077. The next prime is 66145126116127. The reversal of 66145126116123 is 32161162154166.

66145126116123 is a `hidden beast` number, since 6 + 6 + 1 + 4 + 5 + 1 + 2 + 611 + 6 + 1 + 23 = 666.

It is not a de Polignac number, because 66145126116123 - 2⁸ = 66145126115867 is a prime.

It is a super-2 number, since 2×66145126116123² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66145126116127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75052540 + ... + 75928742.

It is an arithmetic number, because the mean of its divisors is an integer number (3988134945522).

Almost surely, 2^{66145126116123} is an apocalyptic number.

66145126116123 is a deficient number, since it is larger than the sum of its proper divisors (29570112576405).

66145126116123 is a wasteful number, since it uses less digits than its factorization.

66145126116123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891323 (or 891320 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 66145126116123 in words is "sixty-six trillion, one hundred forty-five billion, one hundred twenty-six million, one hundred sixteen thousand, one hundred twenty-three".