6619345 has 4 divisors (see below), whose sum is σ = 7943220. Its totient is φ = 5295472.

The previous prime is 6619343. The next prime is 6619357. The reversal of 6619345 is 5439166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5439166 = 2 ⋅2719583.

It can be written as a sum of positive squares in 2 ways, for example, as 5121169 + 1498176 = 2263^2 + 1224^2 .

It is a cyclic number.

It is not a de Polignac number, because 6619345 - 2¹ = 6619343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6619345.

It is not an unprimeable number, because it can be changed into a prime (6619343) 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, 661930 + ... + 661939.

It is an arithmetic number, because the mean of its divisors is an integer number (1985805).

Almost surely, 2^6619345 is an apocalyptic number.

It is an amenable number.

6619345 is a deficient number, since it is larger than the sum of its proper divisors (1323875).

6619345 is a wasteful number, since it uses less digits than its factorization.

6619345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323874.

The product of its digits is 19440, while the sum is 34.

The square root of 6619345 is about 2572.8087764154. The cubic root of 6619345 is about 187.7608340187.

The spelling of 6619345 in words is "six million, six hundred nineteen thousand, three hundred forty-five".