171166047661 has 8 divisors (see below), whose sum is σ = 195625059840. Its totient is φ = 146708715408.

The previous prime is 171166047653. The next prime is 171166047709. The reversal of 171166047661 is 166740661171.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 171166047661 - 2³ = 171166047653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171166047161) 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, 193501 + ... + 616258.

It is an arithmetic number, because the mean of its divisors is an integer number (24453132480).

Almost surely, 2^171166047661 is an apocalyptic number.

It is an amenable number.

171166047661 is a deficient number, since it is larger than the sum of its proper divisors (24459012179).

171166047661 is an equidigital number, since it uses as much as digits as its factorization.

171166047661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839963.

The product of its (nonzero) digits is 254016, while the sum is 46.

The spelling of 171166047661 in words is "one hundred seventy-one billion, one hundred sixty-six million, forty-seven thousand, six hundred sixty-one".