663507 has 24 divisors (see below), whose sum is σ = 1061424. Its totient is φ = 396864.

The previous prime is 663463. The next prime is 663517. The reversal of 663507 is 705366.

It is not a de Polignac number, because 663507 - 2¹⁰ = 662483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6148 + ... + 6254.

It is an arithmetic number, because the mean of its divisors is an integer number (44226).

2⁶⁶³⁵⁰⁷ is an apocalyptic number.

663507 is a deficient number, since it is larger than the sum of its proper divisors (397917).

663507 is a wasteful number, since it uses less digits than its factorization.

663507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 663507 is about 814.5593900999. The cubic root of 663507 is about 87.2198167093.

The spelling of 663507 in words is "six hundred sixty-three thousand, five hundred seven".