166422368136 has 128 divisors (see below), whose sum is σ = 432190080000. Its totient is φ = 53374513920.

The previous prime is 166422368129. The next prime is 166422368137. The reversal of 166422368136 is 631863224661.

It is a super-2 number, since 2×166422368136² (a number of 23 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (166422368137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13968550 + ... + 13980458.

It is an arithmetic number, because the mean of its divisors is an integer number (3376485000).

Almost surely, 2^166422368136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166422368136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216095040000).

166422368136 is an abundant number, since it is smaller than the sum of its proper divisors (265767711864).

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

166422368136 is a wasteful number, since it uses less digits than its factorization.

166422368136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12187 (or 12183 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 48.

The spelling of 166422368136 in words is "one hundred sixty-six billion, four hundred twenty-two million, three hundred sixty-eight thousand, one hundred thirty-six".