166501505 has 8 divisors (see below), whose sum is σ = 200999232. Its totient is φ = 132402928.

The previous prime is 166501493. The next prime is 166501583. The reversal of 166501505 is 505105661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166501505 - 2¹⁸ = 166239361 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98867 + ... + 100536.

It is an arithmetic number, because the mean of its divisors is an integer number (25124904).

Almost surely, 2^166501505 is an apocalyptic number.

It is an amenable number.

166501505 is a deficient number, since it is larger than the sum of its proper divisors (34497727).

166501505 is a wasteful number, since it uses less digits than its factorization.

166501505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199575.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 166501505 is about 12903.5462179976. The cubic root of 166501505 is about 550.1393641327.

The spelling of 166501505 in words is "one hundred sixty-six million, five hundred one thousand, five hundred five".