166606306020 has 432 divisors, whose sum is σ = 639140646144. Its totient is φ = 34385472000.

The previous prime is 166606306003. The next prime is 166606306021. The reversal of 166606306020 is 20603606661.

It is a super-2 number, since 2×166606306020² (a number of 23 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (166606306021) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 23017842 + ... + 23025078.

Almost surely, 2^166606306020 is an apocalyptic number.

166606306020 is a gapful number since it is divisible by the number (10) 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 166606306020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319570323072).

166606306020 is an abundant number, since it is smaller than the sum of its proper divisors (472534340124).

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

166606306020 is a wasteful number, since it uses less digits than its factorization.

166606306020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7432 (or 7416 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The spelling of 166606306020 in words is "one hundred sixty-six billion, six hundred six million, three hundred six thousand, twenty".