66844450167 has 8 divisors (see below), whose sum is σ = 97228291200. Its totient is φ = 40511787960.

The previous prime is 66844450151. The next prime is 66844450181. The reversal of 66844450167 is 76105444866.

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

It is not a de Polignac number, because 66844450167 - 2⁴ = 66844450151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66844450117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012794667 + ... + 1012794732.

It is an arithmetic number, because the mean of its divisors is an integer number (12153536400).

Almost surely, 2^66844450167 is an apocalyptic number.

66844450167 is a deficient number, since it is larger than the sum of its proper divisors (30383841033).

66844450167 is a wasteful number, since it uses less digits than its factorization.

66844450167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025589413.

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 66844450167 in words is "sixty-six billion, eight hundred forty-four million, four hundred fifty thousand, one hundred sixty-seven".