663300007681 has 8 divisors (see below), whose sum is σ = 664421137184. Its totient is φ = 662179626720.

The previous prime is 663300007679. The next prime is 663300007723. The reversal of 663300007681 is 186700003366.

663300007681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 663300007681 - 2¹ = 663300007679 is a prime.

It is a super-2 number, since 2×663300007681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663300007081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1601005 + ... + 1972261.

It is an arithmetic number, because the mean of its divisors is an integer number (83052642148).

Almost surely, 2^663300007681 is an apocalyptic number.

It is an amenable number.

663300007681 is a deficient number, since it is larger than the sum of its proper divisors (1121129503).

663300007681 is a wasteful number, since it uses less digits than its factorization.

663300007681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374271.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 663300007681 in words is "six hundred sixty-three billion, three hundred million, seven thousand, six hundred eighty-one".