166019950265 has 16 divisors (see below), whose sum is σ = 215109070848. Its totient is φ = 122279226816.

The previous prime is 166019950241. The next prime is 166019950297. The reversal of 166019950265 is 562059910661.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 166019950265 - 2¹⁰ = 166019949241 is a prime.

It is a Duffinian number.

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, 3309509 + ... + 3359298.

It is an arithmetic number, because the mean of its divisors is an integer number (13444316928).

Almost surely, 2^166019950265 is an apocalyptic number.

It is an amenable number.

166019950265 is a deficient number, since it is larger than the sum of its proper divisors (49089120583).

166019950265 is a wasteful number, since it uses less digits than its factorization.

166019950265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6669208.

The product of its (nonzero) digits is 874800, while the sum is 50.

The spelling of 166019950265 in words is "one hundred sixty-six billion, nineteen million, nine hundred fifty thousand, two hundred sixty-five".