166113316061655 has 128 divisors (see below), whose sum is σ = 276739653206016. Its totient is φ = 84994818048000.

The previous prime is 166113316061653. The next prime is 166113316061657. The reversal of 166113316061655 is 556160613311661.

It is an interprime number because it is at equal distance from previous prime (166113316061653) and next prime (166113316061657).

It is not a de Polignac number, because 166113316061655 - 2¹ = 166113316061653 is a prime.

It is a super-2 number, since 2×166113316061655² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166113316061598 and 166113316061607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166113316061653) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 24204180754 + ... + 24204187616.

It is an arithmetic number, because the mean of its divisors is an integer number (2162028540672).

Almost surely, 2^{166113316061655} is an apocalyptic number.

166113316061655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166113316061655 is a deficient number, since it is larger than the sum of its proper divisors (110626337144361).

166113316061655 is a wasteful number, since it uses less digits than its factorization.

166113316061655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8097.

The product of its (nonzero) digits is 1749600, while the sum is 51.

The spelling of 166113316061655 in words is "one hundred sixty-six trillion, one hundred thirteen billion, three hundred sixteen million, sixty-one thousand, six hundred fifty-five".