663493501 has 8 divisors (see below), whose sum is σ = 739211904. Its totient is φ = 590341920.

The previous prime is 663493499. The next prime is 663493511. The reversal of 663493501 is 105394366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 663493501 - 2¹ = 663493499 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 (663493511) 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 7 ways as a sum of consecutive naturals, for example, 641160 + ... + 642193.

It is an arithmetic number, because the mean of its divisors is an integer number (92401488).

Almost surely, 2^663493501 is an apocalyptic number.

It is an amenable number.

663493501 is a deficient number, since it is larger than the sum of its proper divisors (75718403).

663493501 is a wasteful number, since it uses less digits than its factorization.

663493501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283411.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 663493501 is about 25758.3675919108. The cubic root of 663493501 is about 872.1922521179.

The spelling of 663493501 in words is "six hundred sixty-three million, four hundred ninety-three thousand, five hundred one".