6630431 has 4 divisors (see below), whose sum is σ = 6771552. Its totient is φ = 6489312.

The previous prime is 6630409. The next prime is 6630433. The reversal of 6630431 is 1340366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6630431 - 2⁶ = 6630367 is a prime.

It is a super-2 number, since 2×6630431² = 87925230491522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6630397 and 6630406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6630433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70490 + ... + 70583.

It is an arithmetic number, because the mean of its divisors is an integer number (1692888).

Almost surely, 2^6630431 is an apocalyptic number.

6630431 is a deficient number, since it is larger than the sum of its proper divisors (141121).

6630431 is a wasteful number, since it uses less digits than its factorization.

6630431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141120.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 6630431 is about 2574.9623298215. The cubic root of 6630431 is about 187.8655954240.

Adding to 6630431 its reverse (1340366), we get a palindrome (7970797).

The spelling of 6630431 in words is "six million, six hundred thirty thousand, four hundred thirty-one".