166316501 has 4 divisors (see below), whose sum is σ = 179110092. Its totient is φ = 153522912.

The previous prime is 166316483. The next prime is 166316531. The reversal of 166316501 is 105613661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105613661 = 1171 ⋅90191.

It can be written as a sum of positive squares in 2 ways, for example, as 43217476 + 123099025 = 6574^2 + 11095^2 .

It is a cyclic number.

It is not a de Polignac number, because 166316501 - 2¹⁴ = 166300117 is a prime.

It is a super-2 number, since 2×166316501² = 55322357009766002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166316531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6396776 + ... + 6396801.

It is an arithmetic number, because the mean of its divisors is an integer number (44777523).

Almost surely, 2^166316501 is an apocalyptic number.

It is an amenable number.

166316501 is a deficient number, since it is larger than the sum of its proper divisors (12793591).

166316501 is a wasteful number, since it uses less digits than its factorization.

166316501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12793590.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 166316501 is about 12896.3754985655. The cubic root of 166316501 is about 549.9355307354.

It can be divided in two parts, 16631 and 6501, that added together give a palindrome (23132).

The spelling of 166316501 in words is "one hundred sixty-six million, three hundred sixteen thousand, five hundred one".