166701520 has 20 divisors (see below), whose sum is σ = 387581220. Its totient is φ = 66680576.

The previous prime is 166701517. The next prime is 166701523. The reversal of 166701520 is 25107661.

It is an interprime number because it is at equal distance from previous prime (166701517) and next prime (166701523).

It can be written as a sum of positive squares in 2 ways, for example, as 90174016 + 76527504 = 9496^2 + 8748^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166701523) 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, 1041805 + ... + 1041964.

It is an arithmetic number, because the mean of its divisors is an integer number (19379061).

Almost surely, 2^166701520 is an apocalyptic number.

166701520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166701520 is an abundant number, since it is smaller than the sum of its proper divisors (220879700).

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

166701520 is a wasteful number, since it uses less digits than its factorization.

166701520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2083782 (or 2083776 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 166701520 is about 12911.2942805902. The cubic root of 166701520 is about 550.3595665324.

The spelling of 166701520 in words is "one hundred sixty-six million, seven hundred one thousand, five hundred twenty".