166208446281 has 16 divisors (see below), whose sum is σ = 223836982848. Its totient is φ = 109693080000.

The previous prime is 166208446249. The next prime is 166208446291. The reversal of 166208446281 is 182644802661.

It is not a de Polignac number, because 166208446281 - 2⁵ = 166208446249 is a prime.

It is a super-2 number, since 2×166208446281² (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 166208446281.

It is not an unprimeable number, because it can be changed into a prime (166208446291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2359290 + ... + 2428716.

It is an arithmetic number, because the mean of its divisors is an integer number (13989811428).

Almost surely, 2^166208446281 is an apocalyptic number.

It is an amenable number.

166208446281 is a deficient number, since it is larger than the sum of its proper divisors (57628536567).

166208446281 is a wasteful number, since it uses less digits than its factorization.

166208446281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77432.

The product of its (nonzero) digits is 884736, while the sum is 48.

The spelling of 166208446281 in words is "one hundred sixty-six billion, two hundred eight million, four hundred forty-six thousand, two hundred eighty-one".