166520016 has 160 divisors (see below), whose sum is σ = 520800000. Its totient is φ = 50637312.

The previous prime is 166519999. The next prime is 166520027. The reversal of 166520016 is 610025661.

It is a happy number.

166520016 is a `hidden beast` number, since 1 + 6 + 652 + 0 + 0 + 1 + 6 = 666.

166520016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 836685 + ... + 836883.

It is an arithmetic number, because the mean of its divisors is an integer number (3255000).

Almost surely, 2^166520016 is an apocalyptic number.

166520016 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 166520016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260400000).

166520016 is an abundant number, since it is smaller than the sum of its proper divisors (354279984).

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

166520016 is a wasteful number, since it uses less digits than its factorization.

166520016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 166520016 is about 12904.2634815010. The cubic root of 166520016 is about 550.1597508401.

Adding to 166520016 its reverse (610025661), we get a palindrome (776545677).

The spelling of 166520016 in words is "one hundred sixty-six million, five hundred twenty thousand, sixteen".