164421682 has 4 divisors (see below), whose sum is σ = 246632526. Its totient is φ = 82210840.

The previous prime is 164421617. The next prime is 164421683. The reversal of 164421682 is 286124461.

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., 159794881 + 4626801 = 12641^2 + 2151^2 .

It is a super-3 number, since 3×164421682³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (164421683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41105419 + ... + 41105422.

Almost surely, 2^164421682 is an apocalyptic number.

164421682 is a deficient number, since it is larger than the sum of its proper divisors (82210844).

164421682 is an equidigital number, since it uses as much as digits as its factorization.

164421682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82210843.

The product of its digits is 18432, while the sum is 34.

The square root of 164421682 is about 12822.7018213791. The cubic root of 164421682 is about 547.8391046466.

The spelling of 164421682 in words is "one hundred sixty-four million, four hundred twenty-one thousand, six hundred eighty-two".