166659270079 has 4 divisors (see below), whose sum is σ = 168667213176. Its totient is φ = 164651326984.

The previous prime is 166659270077. The next prime is 166659270091. The reversal of 166659270079 is 970072956661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 970072956661 = 29 ⋅33450791609.

It is a cyclic number.

It is not a de Polignac number, because 166659270079 - 2¹ = 166659270077 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 (166659270077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1003971424 + ... + 1003971589.

It is an arithmetic number, because the mean of its divisors is an integer number (42166803294).

Almost surely, 2^166659270079 is an apocalyptic number.

166659270079 is a deficient number, since it is larger than the sum of its proper divisors (2007943097).

166659270079 is an equidigital number, since it uses as much as digits as its factorization.

166659270079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007943096.

The product of its (nonzero) digits is 8573040, while the sum is 58.

The spelling of 166659270079 in words is "one hundred sixty-six billion, six hundred fifty-nine million, two hundred seventy thousand, seventy-nine".