663435677 has 4 divisors (see below), whose sum is σ = 664947360. Its totient is φ = 661923996.

The previous prime is 663435649. The next prime is 663435679. The reversal of 663435677 is 776534366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 776534366 = 2 ⋅388267183.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663435677 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 (663435679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 755183 + ... + 756060.

It is an arithmetic number, because the mean of its divisors is an integer number (166236840).

Almost surely, 2^663435677 is an apocalyptic number.

It is an amenable number.

663435677 is a deficient number, since it is larger than the sum of its proper divisors (1511683).

663435677 is a wasteful number, since it uses less digits than its factorization.

663435677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511682.

The product of its digits is 1905120, while the sum is 47.

The square root of 663435677 is about 25757.2451360777. The cubic root of 663435677 is about 872.1669139597.

The spelling of 663435677 in words is "six hundred sixty-three million, four hundred thirty-five thousand, six hundred seventy-seven".