166147501 has 16 divisors (see below), whose sum is σ = 185508400. Its totient is φ = 147806208.

The previous prime is 166147463. The next prime is 166147523. The reversal of 166147501 is 105741661.

It can be written as a sum of positive squares in 8 ways, for example, as 15594601 + 150552900 = 3949^2 + 12270^2 .

It is a cyclic number.

It is not a de Polignac number, because 166147501 - 2⁹ = 166146989 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 (166147301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50845 + ... + 54013.

It is an arithmetic number, because the mean of its divisors is an integer number (11594275).

Almost surely, 2^166147501 is an apocalyptic number.

It is an amenable number.

166147501 is a deficient number, since it is larger than the sum of its proper divisors (19360899).

166147501 is a wasteful number, since it uses less digits than its factorization.

166147501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 166147501 is about 12889.8216046616. The cubic root of 166147501 is about 549.7491980475.

The spelling of 166147501 in words is "one hundred sixty-six million, one hundred forty-seven thousand, five hundred one".