158666688 has 140 divisors (see below), whose sum is σ = 476008192. Its totient is φ = 52254720.

The previous prime is 158666647. The next prime is 158666699. The reversal of 158666688 is 886666851.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 658248 + ... + 658488.

Almost surely, 2^158666688 is an apocalyptic number.

158666688 is a gapful number since it is divisible by the number (18) 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 158666688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238004096).

158666688 is an abundant number, since it is smaller than the sum of its proper divisors (317341504).

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

158666688 is a wasteful number, since it uses less digits than its factorization.

158666688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 373 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The square root of 158666688 is about 12596.2965986039. The cubic root of 158666688 is about 541.3713293775.

The spelling of 158666688 in words is "one hundred fifty-eight million, six hundred sixty-six thousand, six hundred eighty-eight".