663650 has 24 divisors (see below), whose sum is σ = 1330644. Its totient is φ = 244800.

The previous prime is 663631. The next prime is 663653. The reversal of 663650 is 56366.

663650 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 6 ways, for example, as 146689 + 516961 = 383^2 + 719^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 663650.

It is not an unprimeable number, because it can be changed into a prime (663653) 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, 140 + ... + 1160.

2⁶⁶³⁶⁵⁰ is an apocalyptic number.

663650 is an abundant number, since it is smaller than the sum of its proper divisors (666994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663650 is a wasteful number, since it uses less digits than its factorization.

663650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046 (or 1041 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 663650 is about 814.6471628871. The cubic root of 663650 is about 87.2260821734.

The spelling of 663650 in words is "six hundred sixty-three thousand, six hundred fifty".