6620554 has 8 divisors (see below), whose sum is σ = 9942660. Its totient is φ = 3306336.

The previous prime is 6620519. The next prime is 6620587. The reversal of 6620554 is 4550266.

It can be written as a sum of positive squares in 2 ways, for example, as 6620329 + 225 = 2573^2 + 15^2 .

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1062 + ... + 3790.

Almost surely, 2^6620554 is an apocalyptic number.

6620554 is a deficient number, since it is larger than the sum of its proper divisors (3322106).

6620554 is a wasteful number, since it uses less digits than its factorization.

6620554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 6620554 is about 2573.0437229087. The cubic root of 6620554 is about 187.7722646074.

The spelling of 6620554 in words is "six million, six hundred twenty thousand, five hundred fifty-four".