128616066 has 32 divisors (see below), whose sum is σ = 287414400. Its totient is φ = 42631920.

The previous prime is 128616043. The next prime is 128616071. The reversal of 128616066 is 660616821.

It is a self number, because there is not a number n which added to its sum of digits gives 128616066.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3195 + ... + 16353.

It is an arithmetic number, because the mean of its divisors is an integer number (8981700).

Almost surely, 2^128616066 is an apocalyptic number.

128616066 is an abundant number, since it is smaller than the sum of its proper divisors (158798334).

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

128616066 is a wasteful number, since it uses less digits than its factorization.

128616066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13351 (or 13345 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 128616066 is about 11340.9023450517. The cubic root of 128616066 is about 504.7756622099.

The spelling of 128616066 in words is "one hundred twenty-eight million, six hundred sixteen thousand, sixty-six".