6621416 has 8 divisors (see below), whose sum is σ = 12415170. Its totient is φ = 3310704.

The previous prime is 6621413. The next prime is 6621421. The reversal of 6621416 is 6141266.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4218916 + 2402500 = 2054^2 + 1550^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (6621413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413831 + ... + 413846.

Almost surely, 2^6621416 is an apocalyptic number.

It is an amenable number.

6621416 is a deficient number, since it is larger than the sum of its proper divisors (5793754).

6621416 is a wasteful number, since it uses less digits than its factorization.

6621416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827683 (or 827679 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 6621416 is about 2573.2112233550. The cubic root of 6621416 is about 187.7804136066.

The spelling of 6621416 in words is "six million, six hundred twenty-one thousand, four hundred sixteen".