6669624 has 32 divisors (see below), whose sum is σ = 17957520. Its totient is φ = 2052096.

The previous prime is 6669617. The next prime is 6669643. The reversal of 6669624 is 4269666.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10377 + ... + 11000.

Almost surely, 2^6669624 is an apocalyptic number.

It is an amenable number.

6669624 is an abundant number, since it is smaller than the sum of its proper divisors (11287896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6669624 is a wasteful number, since it uses less digits than its factorization.

6669624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21399 (or 21395 counting only the distinct ones).

The product of its digits is 93312, while the sum is 39.

The square root of 6669624 is about 2582.5615191124. The cubic root of 6669624 is about 188.2350312343.

The spelling of 6669624 in words is "six million, six hundred sixty-nine thousand, six hundred twenty-four".