129166600680 has 768 divisors, whose sum is σ = 485424576000. Its totient is φ = 29546643456.

The previous prime is 129166600663. The next prime is 129166600727. The reversal of 129166600680 is 86006661921.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 929256051 + ... + 929256189.

It is an arithmetic number, because the mean of its divisors is an integer number (632063250).

Almost surely, 2^129166600680 is an apocalyptic number.

129166600680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129166600680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242712288000).

129166600680 is an abundant number, since it is smaller than the sum of its proper divisors (356257975320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129166600680 is a wasteful number, since it uses less digits than its factorization.

129166600680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 129166600680 in words is "one hundred twenty-nine billion, one hundred sixty-six million, six hundred thousand, six hundred eighty".