6699623 has 6 divisors (see below), whose sum is σ = 7793496. Its totient is φ = 5742492.

The previous prime is 6699619. The next prime is 6699643. The reversal of 6699623 is 3269966.

It is not a de Polignac number, because 6699623 - 2² = 6699619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6699613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68315 + ... + 68412.

It is an arithmetic number, because the mean of its divisors is an integer number (1298916).

Almost surely, 2^6699623 is an apocalyptic number.

6699623 is a deficient number, since it is larger than the sum of its proper divisors (1093873).

6699623 is a wasteful number, since it uses less digits than its factorization.

6699623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136741 (or 136734 counting only the distinct ones).

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

The square root of 6699623 is about 2588.3629961812. The cubic root of 6699623 is about 188.5168271066.

The spelling of 6699623 in words is "six million, six hundred ninety-nine thousand, six hundred twenty-three".