164666520 has 112 divisors (see below), whose sum is σ = 555593760. Its totient is φ = 43903296.

The previous prime is 164666501. The next prime is 164666527. The reversal of 164666520 is 25666461.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164666527) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 26337 + ... + 31983.

Almost surely, 2^164666520 is an apocalyptic number.

164666520 is a gapful number since it is divisible by the number (10) 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 164666520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277796880).

164666520 is an abundant number, since it is smaller than the sum of its proper divisors (390927240).

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

164666520 is an equidigital number, since it uses as much as digits as its factorization.

164666520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5676 (or 5657 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 164666520 is about 12832.2453218445. The cubic root of 164666520 is about 548.1108962704.

The spelling of 164666520 in words is "one hundred sixty-four million, six hundred sixty-six thousand, five hundred twenty".