166543263744 has 384 divisors, whose sum is σ = 525975690240. Its totient is φ = 46197964800.

The previous prime is 166543263721. The next prime is 166543263791. The reversal of 166543263744 is 447362345661.

It is a tau number, because it is divible by the number of its divisors (384).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115094829 + ... + 115096275.

It is an arithmetic number, because the mean of its divisors is an integer number (1369728360).

Almost surely, 2^166543263744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166543263744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262987845120).

166543263744 is an abundant number, since it is smaller than the sum of its proper divisors (359432426496).

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

166543263744 is a wasteful number, since it uses less digits than its factorization.

166543263744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627 (or 1607 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 51.

The spelling of 166543263744 in words is "one hundred sixty-six billion, five hundred forty-three million, two hundred sixty-three thousand, seven hundred forty-four".