166681835013 has 12 divisors (see below), whose sum is σ = 224338936640. Its totient is φ = 110082684552.

The previous prime is 166681834961. The next prime is 166681835017. The reversal of 166681835013 is 310538186661.

It is not a de Polignac number, because 166681835013 - 2¹⁶ = 166681769477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166681835017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2392093 + ... + 2460786.

Almost surely, 2^166681835013 is an apocalyptic number.

It is an amenable number.

166681835013 is a deficient number, since it is larger than the sum of its proper divisors (57657101627).

166681835013 is an equidigital number, since it uses as much as digits as its factorization.

166681835013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4853096 (or 4852989 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 166681835013 in words is "one hundred sixty-six billion, six hundred eighty-one million, eight hundred thirty-five thousand, thirteen".