663411531 has 8 divisors (see below), whose sum is σ = 893307024. Its totient is φ = 437895200.

The previous prime is 663411509. The next prime is 663411559. The reversal of 663411531 is 135114366.

663411531 = 359² + 360² + ... + 1267².

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 663411531 - 2¹⁰ = 663410507 is a prime.

It is a super-2 number, since 2×663411531² = 880229718927527922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (663411571) 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, 1094436 + ... + 1095041.

It is an arithmetic number, because the mean of its divisors is an integer number (111663378).

Almost surely, 2^663411531 is an apocalyptic number.

663411531 is a deficient number, since it is larger than the sum of its proper divisors (229895493).

663411531 is a wasteful number, since it uses less digits than its factorization.

663411531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189581.

The product of its digits is 6480, while the sum is 30.

The square root of 663411531 is about 25756.7764093258. The cubic root of 663411531 is about 872.1563328797.

Adding to 663411531 its reverse (135114366), we get a palindrome (798525897).

The spelling of 663411531 in words is "six hundred sixty-three million, four hundred eleven thousand, five hundred thirty-one".