164670521 has 8 divisors (see below), whose sum is σ = 168832224. Its totient is φ = 160524000.

The previous prime is 164670509. The next prime is 164670533. The reversal of 164670521 is 125076461.

It is an interprime number because it is at equal distance from previous prime (164670509) and next prime (164670533).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164670521 is a prime.

It is a super-2 number, since 2×164670521² = 54232760972822882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164670221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20021 + ... + 27021.

It is an arithmetic number, because the mean of its divisors is an integer number (21104028).

Almost surely, 2^164670521 is an apocalyptic number.

It is an amenable number.

164670521 is a deficient number, since it is larger than the sum of its proper divisors (4161703).

164670521 is an equidigital number, since it uses as much as digits as its factorization.

164670521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7591.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 164670521 is about 12832.4012172313. The cubic root of 164670521 is about 548.1153354928.

The spelling of 164670521 in words is "one hundred sixty-four million, six hundred seventy thousand, five hundred twenty-one".