166134663666461 has 8 divisors (see below), whose sum is σ = 189868289292864. Its totient is φ = 142401063601440.

The previous prime is 166134663666457. The next prime is 166134663666473. The reversal of 166134663666461 is 164666366431661.

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

It is not a de Polignac number, because 166134663666461 - 2² = 166134663666457 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166134663666451) 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, 10520441 + ... + 21046353.

It is an arithmetic number, because the mean of its divisors is an integer number (23733536161608).

Almost surely, 2^{166134663666461} is an apocalyptic number.

It is an amenable number.

166134663666461 is a deficient number, since it is larger than the sum of its proper divisors (23733625626403).

166134663666461 is a wasteful number, since it uses less digits than its factorization.

166134663666461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12780691.

The product of its digits is 241864704, while the sum is 65.

The spelling of 166134663666461 in words is "one hundred sixty-six trillion, one hundred thirty-four billion, six hundred sixty-three million, six hundred sixty-six thousand, four hundred sixty-one".