158666202864020 has 24 divisors (see below), whose sum is σ = 333488010474024. Its totient is φ = 63411436486656.

The previous prime is 158666202863983. The next prime is 158666202864031. The reversal of 158666202864020 is 20468202666851.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 44337673091716 + 114328529772304 = 6658654^2 + 10692452^2 .

It is a super-2 number, since 2×158666202864020² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3440267549 + ... + 3440313668.

It is an arithmetic number, because the mean of its divisors is an integer number (13895333769751).

Almost surely, 2^{158666202864020} is an apocalyptic number.

158666202864020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158666202864020 is an abundant number, since it is smaller than the sum of its proper divisors (174821807610004).

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

158666202864020 is a wasteful number, since it uses less digits than its factorization.

158666202864020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6880582379 (or 6880582377 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 56.

The spelling of 158666202864020 in words is "one hundred fifty-eight trillion, six hundred sixty-six billion, two hundred two million, eight hundred sixty-four thousand, twenty".