6630623 has 4 divisors (see below), whose sum is σ = 6645408. Its totient is φ = 6615840.

The previous prime is 6630607. The next prime is 6630641. The reversal of 6630623 is 3260366.

It is a happy number.

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 6630623 - 2⁴ = 6630607 is a prime.

It is a super-2 number, since 2×6630623² = 87930322736258, 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 = 6630592 and 6630601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6630653) 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, 6698 + ... + 7623.

It is an arithmetic number, because the mean of its divisors is an integer number (1661352).

Almost surely, 2^6630623 is an apocalyptic number.

6630623 is a deficient number, since it is larger than the sum of its proper divisors (14785).

6630623 is a wasteful number, since it uses less digits than its factorization.

6630623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14784.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 6630623 is about 2574.9996116505. Note that the first 3 decimals coincide. The cubic root of 6630623 is about 187.8674087725.

Adding to 6630623 its reverse (3260366), we get a palindrome (9890989).

The spelling of 6630623 in words is "six million, six hundred thirty thousand, six hundred twenty-three".