166934638663 has 12 divisors (see below), whose sum is σ = 180829803000. Its totient is φ = 154037029536.

The previous prime is 166934638649. The next prime is 166934638691. The reversal of 166934638663 is 366836439661.

It is not a de Polignac number, because 166934638663 - 2¹⁷ = 166934507591 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 (166934638613) 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, 284920 + ... + 644242.

It is an arithmetic number, because the mean of its divisors is an integer number (15069150250).

Almost surely, 2^166934638663 is an apocalyptic number.

166934638663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

166934638663 is a deficient number, since it is larger than the sum of its proper divisors (13895164337).

166934638663 is a wasteful number, since it uses less digits than its factorization.

166934638663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362098 (or 362085 counting only the distinct ones).

The product of its digits is 60466176, while the sum is 61.

The spelling of 166934638663 in words is "one hundred sixty-six billion, nine hundred thirty-four million, six hundred thirty-eight thousand, six hundred sixty-three".