6621430 has 8 divisors (see below), whose sum is σ = 11918592. Its totient is φ = 2648568.

The previous prime is 6621421. The next prime is 6621451. The reversal of 6621430 is 341266.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 331062 + ... + 331081.

It is an arithmetic number, because the mean of its divisors is an integer number (1489824).

Almost surely, 2^6621430 is an apocalyptic number.

6621430 is a deficient number, since it is larger than the sum of its proper divisors (5297162).

6621430 is a wasteful number, since it uses less digits than its factorization.

6621430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662150.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 6621430 is about 2573.2139436899. The cubic root of 6621430 is about 187.7805459511.

Adding to 6621430 its reverse (341266), we get a palindrome (6962696).

The spelling of 6621430 in words is "six million, six hundred twenty-one thousand, four hundred thirty".