166071472772 has 12 divisors (see below), whose sum is σ = 290662860096.
Its totient is φ = 83024941320.
The previous prime is 166071472741. The next prime is 166071472793. The reversal of 166071472772 is 277274170661.
It is a super-2 number, since 2×1660714727722 (a number of 23 digits) contains 22 as substring.
It is a self number, because there is not a number n which added to its sum of digits gives 166071472772.
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2664104 + ... + 2725727.
It is an arithmetic number, because the mean of its divisors is an integer number (24221905008).
Almost surely, 2166071472772 is an apocalyptic number.
It is an amenable number.
166071472772 is a deficient number, since it is larger than the sum of its proper divisors (124591387324).
166071472772 is a wasteful number, since it uses less digits than its factorization.
166071472772 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5397538 (or 5397536 counting only the distinct ones).
The product of its (nonzero) digits is 1382976, while the sum is 50.
The spelling of 166071472772 in words is "one hundred sixty-six billion, seventy-one million, four hundred seventy-two thousand, seven hundred seventy-two".