166798079727 has 16 divisors (see below), whose sum is σ = 235170862080. Its totient is φ = 104986987200.

The previous prime is 166798079717. The next prime is 166798079741. The reversal of 166798079727 is 727970897661.

It is not a de Polignac number, because 166798079727 - 2⁸ = 166798079471 is a prime.

It is a super-2 number, since 2×166798079727² (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 (166798079717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21868477 + ... + 21876102.

It is an arithmetic number, because the mean of its divisors is an integer number (14698178880).

Almost surely, 2^166798079727 is an apocalyptic number.

166798079727 is a deficient number, since it is larger than the sum of its proper divisors (68372782353).

166798079727 is a wasteful number, since it uses less digits than its factorization.

166798079727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43744654.

The product of its (nonzero) digits is 112021056, while the sum is 69.

The spelling of 166798079727 in words is "one hundred sixty-six billion, seven hundred ninety-eight million, seventy-nine thousand, seven hundred twenty-seven".