6630401 has 4 divisors (see below), whose sum is σ = 6670272. Its totient is φ = 6590532.

The previous prime is 6630367. The next prime is 6630409. The reversal of 6630401 is 1040366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6630401 - 2¹⁰ = 6629377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6630409) 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, 19685 + ... + 20018.

It is an arithmetic number, because the mean of its divisors is an integer number (1667568).

Almost surely, 2^6630401 is an apocalyptic number.

It is an amenable number.

6630401 is a deficient number, since it is larger than the sum of its proper divisors (39871).

6630401 is a wasteful number, since it uses less digits than its factorization.

6630401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39870.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 6630401 is about 2574.9565044870. The cubic root of 6630401 is about 187.8653120852.

Adding to 6630401 its reverse (1040366), we get a palindrome (7670767).

The spelling of 6630401 in words is "six million, six hundred thirty thousand, four hundred one".