166412727918 has 12 divisors (see below), whose sum is σ = 360560910528. Its totient is φ = 55470909300.

The previous prime is 166412727911. The next prime is 166412728021. The reversal of 166412727918 is 819727214661.

It is a super-2 number, since 2×166412727918² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166412727911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4622575758 + ... + 4622575793.

It is an arithmetic number, because the mean of its divisors is an integer number (30046742544).

Almost surely, 2^166412727918 is an apocalyptic number.

166412727918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

166412727918 is an abundant number, since it is smaller than the sum of its proper divisors (194148182610).

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

166412727918 is a wasteful number, since it uses less digits than its factorization.

166412727918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9245151559 (or 9245151556 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The spelling of 166412727918 in words is "one hundred sixty-six billion, four hundred twelve million, seven hundred twenty-seven thousand, nine hundred eighteen".