166641967764 has 60 divisors (see below), whose sum is σ = 461260625364. Its totient is φ = 52279831296.

The previous prime is 166641967711. The next prime is 166641967769. The reversal of 166641967764 is 467769146661.

It can be written as a sum of positive squares in 2 ways, for example, as 125817765264 + 40824202500 = 354708^2 + 202050^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166641967769) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15121759 + ... + 15132774.

Almost surely, 2^166641967764 is an apocalyptic number.

It is an amenable number.

166641967764 is an abundant number, since it is smaller than the sum of its proper divisors (294618657600).

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

166641967764 is a wasteful number, since it uses less digits than its factorization.

166641967764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30254566 (or 30254555 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 63.

The spelling of 166641967764 in words is "one hundred sixty-six billion, six hundred forty-one million, nine hundred sixty-seven thousand, seven hundred sixty-four".