663435987207 has 12 divisors (see below), whose sum is σ = 1029002755896. Its totient is φ = 379106278320.

The previous prime is 663435987199. The next prime is 663435987233. The reversal of 663435987207 is 702789534366.

It is not a de Polignac number, because 663435987207 - 2³ = 663435987199 is a prime.

It is a super-3 number, since 3×663435987207³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663435987607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2256584844 + ... + 2256585137.

It is an arithmetic number, because the mean of its divisors is an integer number (85750229658).

Almost surely, 2^663435987207 is an apocalyptic number.

663435987207 is a deficient number, since it is larger than the sum of its proper divisors (365566768689).

663435987207 is a wasteful number, since it uses less digits than its factorization.

663435987207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4513169998 (or 4513169991 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 60.

The spelling of 663435987207 in words is "six hundred sixty-three billion, four hundred thirty-five million, nine hundred eighty-seven thousand, two hundred seven".