166516501 has 8 divisors (see below), whose sum is σ = 167524544. Its totient is φ = 165512160.

The previous prime is 166516499. The next prime is 166516517. The reversal of 166516501 is 105615661.

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 166516501 - 2¹ = 166516499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166516541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160681 + ... + 161713.

It is an arithmetic number, because the mean of its divisors is an integer number (20940568).

Almost surely, 2^166516501 is an apocalyptic number.

It is an amenable number.

166516501 is a deficient number, since it is larger than the sum of its proper divisors (1008043).

166516501 is a wasteful number, since it uses less digits than its factorization.

166516501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 166516501 is about 12904.1272854851. The cubic root of 166516501 is about 550.1558797837.

The spelling of 166516501 in words is "one hundred sixty-six million, five hundred sixteen thousand, five hundred one".