663536431 has 16 divisors (see below), whose sum is σ = 693606400. Its totient is φ = 634068000.

The previous prime is 663536413. The next prime is 663536437. The reversal of 663536431 is 134635366.

It is a cyclic number.

It is not a de Polignac number, because 663536431 - 2⁵ = 663536399 is a prime.

It is a super-2 number, since 2×663536431² = 880561190528435522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663536437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1071640 + ... + 1072258.

It is an arithmetic number, because the mean of its divisors is an integer number (43350400).

Almost surely, 2^663536431 is an apocalyptic number.

663536431 is a deficient number, since it is larger than the sum of its proper divisors (30069969).

663536431 is a wasteful number, since it uses less digits than its factorization.

663536431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030.

The product of its digits is 116640, while the sum is 37.

The square root of 663536431 is about 25759.2008998727. The cubic root of 663536431 is about 872.2110628552.

The spelling of 663536431 in words is "six hundred sixty-three million, five hundred thirty-six thousand, four hundred thirty-one".