166332520 has 16 divisors (see below), whose sum is σ = 374248260. Its totient is φ = 66532992.

The previous prime is 166332503. The next prime is 166332521. The reversal of 166332520 is 25233661.

It can be written as a sum of positive squares in 2 ways, for example, as 166255236 + 77284 = 12894^2 + 278^2 .

It is not an unprimeable number, because it can be changed into a prime (166332521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2079117 + ... + 2079196.

Almost surely, 2^166332520 is an apocalyptic number.

166332520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166332520 is an abundant number, since it is smaller than the sum of its proper divisors (207915740).

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

166332520 is a wasteful number, since it uses less digits than its factorization.

166332520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4158324 (or 4158320 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 166332520 is about 12896.9965495847. The cubic root of 166332520 is about 549.9531860981.

The spelling of 166332520 in words is "one hundred sixty-six million, three hundred thirty-two thousand, five hundred twenty".