3664424581 has 8 divisors (see below), whose sum is σ = 3752924504. Its totient is φ = 3576960000.

The previous prime is 3664424573. The next prime is 3664424597. The reversal of 3664424581 is 1854244663.

It can be written as a sum of positive squares in 4 ways, for example, as 1018248100 + 2646176481 = 31910^2 + 51441^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3664424581 - 2³ = 3664424573 is a prime.

It is a super-2 number, since 2×3664424581² = 26856015019674051122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3664421581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251670 + ... + 265831.

It is an arithmetic number, because the mean of its divisors is an integer number (469115563).

Almost surely, 2^3664424581 is an apocalyptic number.

It is an amenable number.

3664424581 is a deficient number, since it is larger than the sum of its proper divisors (88499923).

3664424581 is an equidigital number, since it uses as much as digits as its factorization.

3664424581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517671.

The product of its digits is 552960, while the sum is 43.

The square root of 3664424581 is about 60534.4908378686. The cubic root of 3664424581 is about 1541.7073015804.

The spelling of 3664424581 in words is "three billion, six hundred sixty-four million, four hundred twenty-four thousand, five hundred eighty-one".