66426463666123 has 12 divisors (see below), whose sum is σ = 73014768589840. Its totient is φ = 60387234011280.

The previous prime is 66426463666117. The next prime is 66426463666127. The reversal of 66426463666123 is 32166636462466.

It is not a de Polignac number, because 66426463666123 - 2¹⁷ = 66426463535051 is a prime.

It is a super-2 number, since 2×66426463666123² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66426463666127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14384293 + ... + 18432601.

Almost surely, 2^{66426463666123} is an apocalyptic number.

66426463666123 is a deficient number, since it is larger than the sum of its proper divisors (6588304923717).

66426463666123 is a wasteful number, since it uses less digits than its factorization.

66426463666123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4183938 (or 4183927 counting only the distinct ones).

The product of its digits is 161243136, while the sum is 61.

The spelling of 66426463666123 in words is "sixty-six trillion, four hundred twenty-six billion, four hundred sixty-three million, six hundred sixty-six thousand, one hundred twenty-three".