166382215020 has 120 divisors (see below), whose sum is σ = 596511093024. Its totient is φ = 38030217984.

The previous prime is 166382215003. The next prime is 166382215049. The reversal of 166382215020 is 20512283661.

166382215020 is a `hidden beast` number, since 1 + 6 + 638 + 2 + 2 + 15 + 0 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7324737 + ... + 7347416.

Almost surely, 2^166382215020 is an apocalyptic number.

166382215020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166382215020 is an abundant number, since it is smaller than the sum of its proper divisors (430128878004).

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

166382215020 is a wasteful number, since it uses less digits than its factorization.

166382215020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14672181 (or 14672170 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Adding to 166382215020 its reverse (20512283661), we get a palindrome (186894498681).

The spelling of 166382215020 in words is "one hundred sixty-six billion, three hundred eighty-two million, two hundred fifteen thousand, twenty".