166785688416 has 48 divisors (see below), whose sum is σ = 463566109104. Its totient is φ = 52324921344.

The previous prime is 166785688409. The next prime is 166785688417. The reversal of 166785688416 is 614886587661.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166785688417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51096925 + ... + 51100188.

It is an arithmetic number, because the mean of its divisors is an integer number (9657627273).

Almost surely, 2^166785688416 is an apocalyptic number.

166785688416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166785688416 is an abundant number, since it is smaller than the sum of its proper divisors (296780420688).

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

166785688416 is a wasteful number, since it uses less digits than its factorization.

166785688416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102197143 (or 102197135 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 66.

The spelling of 166785688416 in words is "one hundred sixty-six billion, seven hundred eighty-five million, six hundred eighty-eight thousand, four hundred sixteen".