63664413 has 4 divisors (see below), whose sum is σ = 84885888. Its totient is φ = 42442940.

The previous prime is 63664411. The next prime is 63664417. The reversal of 63664413 is 31446636.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63664413 - 2¹ = 63664411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63664411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10610733 + ... + 10610738.

It is an arithmetic number, because the mean of its divisors is an integer number (21221472).

Almost surely, 2^63664413 is an apocalyptic number.

It is an amenable number.

63664413 is a deficient number, since it is larger than the sum of its proper divisors (21221475).

63664413 is a wasteful number, since it uses less digits than its factorization.

63664413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21221474.

The product of its digits is 31104, while the sum is 33.

The square root of 63664413 is about 7978.9982453940. The cubic root of 63664413 is about 399.2996348540.

The spelling of 63664413 in words is "sixty-three million, six hundred sixty-four thousand, four hundred thirteen".