164647066 has 4 divisors (see below), whose sum is σ = 246970602. Its totient is φ = 82323532.

The previous prime is 164647061. The next prime is 164647117. The reversal of 164647066 is 660746461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 115240225 + 49406841 = 10735^2 + 7029^2 .

It is not an unprimeable number, because it can be changed into a prime (164647061) 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 as a sum of consecutive naturals, namely, 41161765 + ... + 41161768.

Almost surely, 2^164647066 is an apocalyptic number.

164647066 is a deficient number, since it is larger than the sum of its proper divisors (82323536).

164647066 is an equidigital number, since it uses as much as digits as its factorization.

164647066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82323535.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 164647066 is about 12831.4872871386. The cubic root of 164647066 is about 548.0893104833.

The spelling of 164647066 in words is "one hundred sixty-four million, six hundred forty-seven thousand, sixty-six".