166859167749 has 8 divisors (see below), whose sum is σ = 222588656160. Its totient is φ = 111184562256.

The previous prime is 166859167693. The next prime is 166859167781. The reversal of 166859167749 is 947761958661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166859167749 - 2¹¹ = 166859165701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166859167549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13713634 + ... + 13725795.

It is an arithmetic number, because the mean of its divisors is an integer number (27823582020).

Almost surely, 2^166859167749 is an apocalyptic number.

It is an amenable number.

166859167749 is a deficient number, since it is larger than the sum of its proper divisors (55729488411).

166859167749 is a wasteful number, since it uses less digits than its factorization.

166859167749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27441459.

The product of its digits is 137168640, while the sum is 69.

The spelling of 166859167749 in words is "one hundred sixty-six billion, eight hundred fifty-nine million, one hundred sixty-seven thousand, seven hundred forty-nine".