166682667444 has 12 divisors (see below), whose sum is σ = 388926224064. Its totient is φ = 55560889144.

The previous prime is 166682667443. The next prime is 166682667479. The reversal of 166682667444 is 444766286661.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×166682667444² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166682667443) 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, 6945111132 + ... + 6945111155.

It is an arithmetic number, because the mean of its divisors is an integer number (32410518672).

Almost surely, 2^166682667444 is an apocalyptic number.

It is an amenable number.

166682667444 is an abundant number, since it is smaller than the sum of its proper divisors (222243556620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166682667444 is a wasteful number, since it uses less digits than its factorization.

166682667444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13890222294 (or 13890222292 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 60.

The spelling of 166682667444 in words is "one hundred sixty-six billion, six hundred eighty-two million, six hundred sixty-seven thousand, four hundred forty-four".