664020022 has 8 divisors (see below), whose sum is σ = 997988400. Its totient is φ = 331357224.

The previous prime is 664020013. The next prime is 664020023. The reversal of 664020022 is 220020466.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 664019975 and 664020002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664020023) 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 3 ways as a sum of consecutive naturals, for example, 325122 + ... + 327157.

It is an arithmetic number, because the mean of its divisors is an integer number (124748550).

Almost surely, 2^664020022 is an apocalyptic number.

664020022 is a deficient number, since it is larger than the sum of its proper divisors (333968378).

664020022 is a wasteful number, since it uses less digits than its factorization.

664020022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652790.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 664020022 is about 25768.5859526673. The cubic root of 664020022 is about 872.4229030160.

Adding to 664020022 its reverse (220020466), we get a palindrome (884040488).

It can be divided in two parts, 6640 and 20022, that added together give a palindrome (26662).

The spelling of 664020022 in words is "six hundred sixty-four million, twenty thousand, twenty-two".