6623699 has 4 divisors (see below), whose sum is σ = 6631680. Its totient is φ = 6615720.

The previous prime is 6623611. The next prime is 6623707. The reversal of 6623699 is 9963266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9963266 = 2 ⋅4981633.

It is a cyclic number.

It is not a de Polignac number, because 6623699 - 2¹⁶ = 6558163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6623899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2579 + ... + 4460.

It is an arithmetic number, because the mean of its divisors is an integer number (1657920).

Almost surely, 2^6623699 is an apocalyptic number.

6623699 is a deficient number, since it is larger than the sum of its proper divisors (7981).

6623699 is an equidigital number, since it uses as much as digits as its factorization.

6623699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7980.

The product of its digits is 104976, while the sum is 41.

The square root of 6623699 is about 2573.6547942566. The cubic root of 6623699 is about 187.8019927483.

The spelling of 6623699 in words is "six million, six hundred twenty-three thousand, six hundred ninety-nine".