166595868011 has 4 divisors (see below), whose sum is σ = 166600167552. Its totient is φ = 166591568472.

The previous prime is 166595867981. The next prime is 166595868013. The reversal of 166595868011 is 110868595661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110868595661 = 97 ⋅1142975213.

It is a cyclic number.

It is not a de Polignac number, because 166595868011 - 2⁶ = 166595867947 is a prime.

It is a super-2 number, since 2×166595868011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166595868013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2091116 + ... + 2169321.

It is an arithmetic number, because the mean of its divisors is an integer number (41650041888).

Almost surely, 2^166595868011 is an apocalyptic number.

166595868011 is a deficient number, since it is larger than the sum of its proper divisors (4299541).

166595868011 is an equidigital number, since it uses as much as digits as its factorization.

166595868011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4299540.

The product of its (nonzero) digits is 3110400, while the sum is 56.

The spelling of 166595868011 in words is "one hundred sixty-six billion, five hundred ninety-five million, eight hundred sixty-eight thousand, eleven".