63668573 has 4 divisors (see below), whose sum is σ = 63695388. Its totient is φ = 63641760.

The previous prime is 63668557. The next prime is 63668581. The reversal of 63668573 is 37586636.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28111204 + 35557369 = 5302^2 + 5963^2 .

It is a cyclic number.

It is not a de Polignac number, because 63668573 - 2⁴ = 63668557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63668593) 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, 9458 + ... + 14723.

It is an arithmetic number, because the mean of its divisors is an integer number (15923847).

Almost surely, 2^63668573 is an apocalyptic number.

It is an amenable number.

63668573 is a deficient number, since it is larger than the sum of its proper divisors (26815).

63668573 is a wasteful number, since it uses less digits than its factorization.

63668573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26814.

The product of its digits is 544320, while the sum is 44.

The square root of 63668573 is about 7979.2589254893. The cubic root of 63668573 is about 399.3083317603.

The spelling of 63668573 in words is "sixty-three million, six hundred sixty-eight thousand, five hundred seventy-three".