1664365106 has 8 divisors (see below), whose sum is σ = 2530747164. Its totient is φ = 820782720.

The previous prime is 1664365103. The next prime is 1664365121. The reversal of 1664365106 is 6015634661.

It can be written as a sum of positive squares in 2 ways, for example, as 1635474481 + 28890625 = 40441^2 + 5375^2 .

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

It is a super-2 number, since 2×1664365106² = 5540222412140782472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1664365106.

It is not an unprimeable number, because it can be changed into a prime (1664365103) 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, 5699735 + ... + 5700026.

Almost surely, 2^1664365106 is an apocalyptic number.

1664365106 is a deficient number, since it is larger than the sum of its proper divisors (866382058).

1664365106 is a wasteful number, since it uses less digits than its factorization.

1664365106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11399836.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 1664365106 is about 40796.6310618904. The cubic root of 1664365106 is about 1185.0850897020.

Adding to 1664365106 its reverse (6015634661), we get a palindrome (7679999767).

The spelling of 1664365106 in words is "one billion, six hundred sixty-four million, three hundred sixty-five thousand, one hundred six".