166639766983 has 8 divisors (see below), whose sum is σ = 169170782976. Its totient is φ = 164126028000.

The previous prime is 166639766963. The next prime is 166639767011. The reversal of 166639766983 is 389667936661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166639766983 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 (166639766963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4299816 + ... + 4338397.

It is an arithmetic number, because the mean of its divisors is an integer number (21146347872).

Almost surely, 2^166639766983 is an apocalyptic number.

166639766983 is a deficient number, since it is larger than the sum of its proper divisors (2531015993).

166639766983 is a wasteful number, since it uses less digits than its factorization.

166639766983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8638505.

The product of its digits is 317447424, while the sum is 70.

The spelling of 166639766983 in words is "one hundred sixty-six billion, six hundred thirty-nine million, seven hundred sixty-six thousand, nine hundred eighty-three".