663700447 has 4 divisors (see below), whose sum is σ = 663844896. Its totient is φ = 663556000.

The previous prime is 663700441. The next prime is 663700463. The reversal of 663700447 is 744007366.

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

It is a cyclic number.

It is not a de Polignac number, because 663700447 - 2⁷ = 663700319 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 (663700441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65098 + ... + 74599.

It is an arithmetic number, because the mean of its divisors is an integer number (165961224).

Almost surely, 2^663700447 is an apocalyptic number.

663700447 is a deficient number, since it is larger than the sum of its proper divisors (144449).

663700447 is a wasteful number, since it uses less digits than its factorization.

663700447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144448.

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 663700447 is about 25762.3843422925. The cubic root of 663700447 is about 872.2829226544.

The spelling of 663700447 in words is "six hundred sixty-three million, seven hundred thousand, four hundred forty-seven".