6648623 has 2 divisors, whose sum is σ = 6648624. Its totient is φ = 6648622.

The previous prime is 6648599. The next prime is 6648637. The reversal of 6648623 is 3268466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6648623 - 2¹² = 6644527 is a prime.

It is a super-2 number, since 2×6648623² = 88408375592258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6648023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3324311 + 3324312.

It is an arithmetic number, because the mean of its divisors is an integer number (3324312).

Almost surely, 2^6648623 is an apocalyptic number.

6648623 is a deficient number, since it is larger than the sum of its proper divisors (1).

6648623 is an equidigital number, since it uses as much as digits as its factorization.

6648623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 35.

The square root of 6648623 is about 2578.4923889746. The cubic root of 6648623 is about 188.0372549528.

The spelling of 6648623 in words is "six million, six hundred forty-eight thousand, six hundred twenty-three".