166285810128 has 40 divisors (see below), whose sum is σ = 429618225888. Its totient is φ = 55422596992.

The previous prime is 166285810127. The next prime is 166285810129. The reversal of 166285810128 is 821018582661.

It is an interprime number because it is at equal distance from previous prime (166285810127) and next prime (166285810129).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166285810127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271450 + ... + 637382.

Almost surely, 2^166285810128 is an apocalyptic number.

It is an amenable number.

166285810128 is an abundant number, since it is smaller than the sum of its proper divisors (263332415760).

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

166285810128 is a wasteful number, since it uses less digits than its factorization.

166285810128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375411 (or 375405 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 48.

The spelling of 166285810128 in words is "one hundred sixty-six billion, two hundred eighty-five million, eight hundred ten thousand, one hundred twenty-eight".