166445053801 has 16 divisors (see below), whose sum is σ = 179997358464. Its totient is φ = 153000169344.

The previous prime is 166445053799. The next prime is 166445053837. The reversal of 166445053801 is 108350544661.

It is a cyclic number.

It is not a de Polignac number, because 166445053801 - 2¹ = 166445053799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166445053861) 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, 11128210 + ... + 11143156.

It is an arithmetic number, because the mean of its divisors is an integer number (11249834904).

Almost surely, 2^166445053801 is an apocalyptic number.

It is an amenable number.

166445053801 is a deficient number, since it is larger than the sum of its proper divisors (13552304663).

166445053801 is a wasteful number, since it uses less digits than its factorization.

166445053801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18480.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 166445053801 in words is "one hundred sixty-six billion, four hundred forty-five million, fifty-three thousand, eight hundred one".