663697783 has 8 divisors (see below), whose sum is σ = 758729600. Its totient is φ = 568720440.

The previous prime is 663697777. The next prime is 663697813. The reversal of 663697783 is 387796366.

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 663697783 - 2⁹ = 663697271 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 (663697753) 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 7 ways as a sum of consecutive naturals, for example, 17128 + ... + 40258.

It is an arithmetic number, because the mean of its divisors is an integer number (94841200).

Almost surely, 2^663697783 is an apocalyptic number.

663697783 is a deficient number, since it is larger than the sum of its proper divisors (95031817).

663697783 is a wasteful number, since it uses less digits than its factorization.

663697783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27237.

The product of its digits is 6858432, while the sum is 55.

The square root of 663697783 is about 25762.3326389518. The cubic root of 663697783 is about 872.2817555793.

The spelling of 663697783 in words is "six hundred sixty-three million, six hundred ninety-seven thousand, seven hundred eighty-three".