166255126607 has 4 divisors (see below), whose sum is σ = 167314076616. Its totient is φ = 165196176600.

The previous prime is 166255126603. The next prime is 166255126673. The reversal of 166255126607 is 706621552661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 706621552661 = 95311 ⋅7413851.

It is a cyclic number.

It is not a de Polignac number, because 166255126607 - 2² = 166255126603 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 (166255126603) 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, 529474769 + ... + 529475082.

It is an arithmetic number, because the mean of its divisors is an integer number (41828519154).

Almost surely, 2^166255126607 is an apocalyptic number.

166255126607 is a deficient number, since it is larger than the sum of its proper divisors (1058950009).

166255126607 is a wasteful number, since it uses less digits than its factorization.

166255126607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058950008.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 166255126607 in words is "one hundred sixty-six billion, two hundred fifty-five million, one hundred twenty-six thousand, six hundred seven".