166540016 has 40 divisors (see below), whose sum is σ = 341109120. Its totient is φ = 78549696.

The previous prime is 166540013. The next prime is 166540019. The reversal of 166540016 is 610045661.

It is an interprime number because it is at equal distance from previous prime (166540013) and next prime (166540019).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166540013) 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, 78911 + ... + 80993.

It is an arithmetic number, because the mean of its divisors is an integer number (8527728).

Almost surely, 2^166540016 is an apocalyptic number.

166540016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166540016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170554560).

166540016 is an abundant number, since it is smaller than the sum of its proper divisors (174569104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166540016 is a wasteful number, since it uses less digits than its factorization.

166540016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373 (or 2367 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 166540016 is about 12905.0383959134. The cubic root of 166540016 is about 550.1817757289.

Adding to 166540016 its reverse (610045661), we get a palindrome (776585677).

The spelling of 166540016 in words is "one hundred sixty-six million, five hundred forty thousand, sixteen".