129666805066 has 16 divisors (see below), whose sum is σ = 196733361600. Its totient is φ = 64089371808.

The previous prime is 129666805049. The next prime is 129666805097. The reversal of 129666805066 is 660508666921.

It is a junction number, because it is equal to n+sod(n) for n = 129666804998 and 129666805016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664651 + ... + 837313.

It is an arithmetic number, because the mean of its divisors is an integer number (12295835100).

Almost surely, 2^129666805066 is an apocalyptic number.

129666805066 is a deficient number, since it is larger than the sum of its proper divisors (67066556534).

129666805066 is a wasteful number, since it uses less digits than its factorization.

129666805066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176973.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 129666805066 in words is "one hundred twenty-nine billion, six hundred sixty-six million, eight hundred five thousand, sixty-six".