166025617007 has 4 divisors (see below), whose sum is σ = 166061974896. Its totient is φ = 165989259120.

The previous prime is 166025616989. The next prime is 166025617057. The reversal of 166025617007 is 700716520661.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 166025617007 - 2⁶ = 166025616943 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 (166025617057) 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, 18172094 + ... + 18181227.

It is an arithmetic number, because the mean of its divisors is an integer number (41515493724).

Almost surely, 2^166025617007 is an apocalyptic number.

166025617007 is a deficient number, since it is larger than the sum of its proper divisors (36357889).

166025617007 is an equidigital number, since it uses as much as digits as its factorization.

166025617007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36357888.

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 166025617007 in words is "one hundred sixty-six billion, twenty-five million, six hundred seventeen thousand, seven".