166288730040 has 96 divisors (see below), whose sum is σ = 542361970800. Its totient is φ = 44185827840.

The previous prime is 166288730039. The next prime is 166288730093. The reversal of 166288730040 is 40037882661.

166288730040 is a `hidden beast` number, since 1 + 66 + 288 + 7 + 300 + 4 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 720750 + ... + 923069.

Almost surely, 2^166288730040 is an apocalyptic number.

166288730040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166288730040 is an abundant number, since it is smaller than the sum of its proper divisors (376073240760).

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

166288730040 is a wasteful number, since it uses less digits than its factorization.

166288730040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644117 (or 1644110 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 166288730040 in words is "one hundred sixty-six billion, two hundred eighty-eight million, seven hundred thirty thousand, forty".