166521517066706 has 8 divisors (see below), whose sum is σ = 260642374539264. Its totient is φ = 79640725553620.

The previous prime is 166521517066679. The next prime is 166521517066721. The reversal of 166521517066706 is 607660715125661.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1810016489810 + ... + 1810016489901.

It is an arithmetic number, because the mean of its divisors is an integer number (32580296817408).

Almost surely, 2^{166521517066706} is an apocalyptic number.

166521517066706 is a deficient number, since it is larger than the sum of its proper divisors (94120857472558).

166521517066706 is a wasteful number, since it uses less digits than its factorization.

166521517066706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620032979736.

The product of its (nonzero) digits is 19051200, while the sum is 59.

The spelling of 166521517066706 in words is "one hundred sixty-six trillion, five hundred twenty-one billion, five hundred seventeen million, sixty-six thousand, seven hundred six".