663729703667 has 4 divisors (see below), whose sum is σ = 663739064160. Its totient is φ = 663720343176.

The previous prime is 663729703639. The next prime is 663729703673. The reversal of 663729703667 is 766307927366.

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 663729703667 - 2¹² = 663729699571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663729703607) 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, 4573067 + ... + 4715972.

It is an arithmetic number, because the mean of its divisors is an integer number (165934766040).

Almost surely, 2^663729703667 is an apocalyptic number.

663729703667 is a deficient number, since it is larger than the sum of its proper divisors (9360493).

663729703667 is an equidigital number, since it uses as much as digits as its factorization.

663729703667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9360492.

The product of its (nonzero) digits is 72013536, while the sum is 62.

The spelling of 663729703667 in words is "six hundred sixty-three billion, seven hundred twenty-nine million, seven hundred three thousand, six hundred sixty-seven".