166995669744 has 240 divisors, whose sum is σ = 497344556800. Its totient is φ = 52160661504.

The previous prime is 166995669733. The next prime is 166995669767. The reversal of 166995669744 is 447966599661.

166995669744 is a `hidden beast` number, since 16 + 6 + 9 + 9 + 566 + 9 + 7 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 128161797 + ... + 128163099.

Almost surely, 2^166995669744 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 166995669744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248672278400).

166995669744 is an abundant number, since it is smaller than the sum of its proper divisors (330348887056).

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

166995669744 is a wasteful number, since it uses less digits than its factorization.

166995669744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812 (or 1803 counting only the distinct ones).

The product of its digits is 529079040, while the sum is 72.

The spelling of 166995669744 in words is "one hundred sixty-six billion, nine hundred ninety-five million, six hundred sixty-nine thousand, seven hundred forty-four".