166031445256 has 16 divisors (see below), whose sum is σ = 315249580800. Its totient is φ = 81964890384.

The previous prime is 166031445211. The next prime is 166031445259. The reversal of 166031445256 is 652544130661.

It is a super-2 number, since 2×166031445256² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166031445259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131353360 + ... + 131354623.

It is an arithmetic number, because the mean of its divisors is an integer number (19703098800).

Almost surely, 2^166031445256 is an apocalyptic number.

It is an amenable number.

166031445256 is a deficient number, since it is larger than the sum of its proper divisors (149218135544).

166031445256 is a wasteful number, since it uses less digits than its factorization.

166031445256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262708068 (or 262708064 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 166031445256 in words is "one hundred sixty-six billion, thirty-one million, four hundred forty-five thousand, two hundred fifty-six".