66018746167 has 4 divisors (see below), whose sum is σ = 72020450376. Its totient is φ = 60017041960.

The previous prime is 66018746159. The next prime is 66018746177. The reversal of 66018746167 is 76164781066.

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

It is a cyclic number.

It is not a de Polignac number, because 66018746167 - 2³ = 66018746159 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 (66018746137) 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, 3000852088 + ... + 3000852109.

It is an arithmetic number, because the mean of its divisors is an integer number (18005112594).

Almost surely, 2^66018746167 is an apocalyptic number.

66018746167 is a deficient number, since it is larger than the sum of its proper divisors (6001704209).

66018746167 is a wasteful number, since it uses less digits than its factorization.

66018746167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6001704208.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 66018746167 in words is "sixty-six billion, eighteen million, seven hundred forty-six thousand, one hundred sixty-seven".