663345783 has 12 divisors (see below), whose sum is σ = 999825840. Its totient is φ = 423002976.

The previous prime is 663345743. The next prime is 663345799. The reversal of 663345783 is 387543366.

663345783 is a `hidden beast` number, since 6 + 633 + 4 + 5 + 7 + 8 + 3 = 666.

It is not a de Polignac number, because 663345783 - 2¹⁸ = 663083639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663345713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1602078 + ... + 1602491.

It is an arithmetic number, because the mean of its divisors is an integer number (83318820).

Almost surely, 2^663345783 is an apocalyptic number.

663345783 is a deficient number, since it is larger than the sum of its proper divisors (336480057).

663345783 is a wasteful number, since it uses less digits than its factorization.

663345783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204598 (or 3204595 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 45.

The square root of 663345783 is about 25755.5000533867. The cubic root of 663345783 is about 872.1275199804.

It can be divided in two parts, 663345 and 783, that added together give a triangular number (664128 = T₁₁₅₂).

The spelling of 663345783 in words is "six hundred sixty-three million, three hundred forty-five thousand, seven hundred eighty-three".