166412727917 has 8 divisors (see below), whose sum is σ = 167556859416. Its totient is φ = 165269662272.

The previous prime is 166412727911. The next prime is 166412728021. The reversal of 166412727917 is 719727214661.

It can be written as a sum of positive squares in 4 ways, for example, as 642419716 + 165770308201 = 25346^2 + 407149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166412727917 - 2⁸ = 166412727661 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 48143 + ... + 578915.

It is an arithmetic number, because the mean of its divisors is an integer number (20944607427).

Almost surely, 2^166412727917 is an apocalyptic number.

It is an amenable number.

166412727917 is a deficient number, since it is larger than the sum of its proper divisors (1144131499).

166412727917 is a wasteful number, since it uses less digits than its factorization.

166412727917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532927.

The product of its digits is 1778112, while the sum is 53.

The spelling of 166412727917 in words is "one hundred sixty-six billion, four hundred twelve million, seven hundred twenty-seven thousand, nine hundred seventeen".