6620473 has 4 divisors (see below), whose sum is σ = 6628900. Its totient is φ = 6612048.

The previous prime is 6620461. The next prime is 6620489. The reversal of 6620473 is 3740266.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5555449 + 1065024 = 2357^2 + 1032^2 .

It is a cyclic number.

It is not a de Polignac number, because 6620473 - 2⁵ = 6620441 is a prime.

It is a Duffinian number.

6620473 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6620423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2898 + ... + 4651.

It is an arithmetic number, because the mean of its divisors is an integer number (1657225).

Almost surely, 2^6620473 is an apocalyptic number.

It is an amenable number.

6620473 is a deficient number, since it is larger than the sum of its proper divisors (8427).

6620473 is an equidigital number, since it uses as much as digits as its factorization.

6620473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8426.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 6620473 is about 2573.0279827472. The cubic root of 6620473 is about 187.7714988298.

The spelling of 6620473 in words is "six million, six hundred twenty thousand, four hundred seventy-three".