166071472771 has 8 divisors (see below), whose sum is σ = 180592826400. Its totient is φ = 152078168448.

The previous prime is 166071472741. The next prime is 166071472793. The reversal of 166071472771 is 177274170661.

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 166071472771 - 2¹¹ = 166071470723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166071472741) 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, 132011671 + ... + 132012928.

It is an arithmetic number, because the mean of its divisors is an integer number (22574103300).

Almost surely, 2^166071472771 is an apocalyptic number.

166071472771 is a deficient number, since it is larger than the sum of its proper divisors (14521353629).

166071472771 is a wasteful number, since it uses less digits than its factorization.

166071472771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264024653.

The product of its (nonzero) digits is 691488, while the sum is 49.

The spelling of 166071472771 in words is "one hundred sixty-six billion, seventy-one million, four hundred seventy-two thousand, seven hundred seventy-one".