166505135402444 has 48 divisors (see below), whose sum is σ = 312778673786880. Its totient is φ = 77315491281600.

The previous prime is 166505135402377. The next prime is 166505135402471. The reversal of 166505135402444 is 444204531505661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 166505135402392 and 166505135402401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13320734 + ... + 22593189.

It is an arithmetic number, because the mean of its divisors is an integer number (6516222370560).

Almost surely, 2^{166505135402444} is an apocalyptic number.

It is an amenable number.

166505135402444 is a deficient number, since it is larger than the sum of its proper divisors (146273538384436).

166505135402444 is a wasteful number, since it uses less digits than its factorization.

166505135402444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35915150 (or 35915148 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 50.

The spelling of 166505135402444 in words is "one hundred sixty-six trillion, five hundred five billion, one hundred thirty-five million, four hundred two thousand, four hundred forty-four".