129906660 has 96 divisors (see below), whose sum is σ = 405296640. Its totient is φ = 30868992.

The previous prime is 129906611. The next prime is 129906671. The reversal of 129906660 is 66609921.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19749 + ... + 25491.

It is an arithmetic number, because the mean of its divisors is an integer number (4221840).

Almost surely, 2^129906660 is an apocalyptic number.

129906660 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 129906660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202648320).

129906660 is an abundant number, since it is smaller than the sum of its proper divisors (275389980).

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

129906660 is a wasteful number, since it uses less digits than its factorization.

129906660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5797 (or 5795 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 129906660 is about 11397.6602862166. The cubic root of 129906660 is about 506.4584314727.

The spelling of 129906660 in words is "one hundred twenty-nine million, nine hundred six thousand, six hundred sixty".