6603945 has 32 divisors (see below), whose sum is σ = 11068032. Its totient is φ = 3359232.

The previous prime is 6603943. The next prime is 6603953. The reversal of 6603945 is 5493066.

It is a happy number.

It is not a de Polignac number, because 6603945 - 2¹ = 6603943 is a prime.

It is a super-2 number, since 2×6603945² = 87224179126050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6603943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40434 + ... + 40596.

It is an arithmetic number, because the mean of its divisors is an integer number (345876).

Almost surely, 2^6603945 is an apocalyptic number.

It is an amenable number.

6603945 is a deficient number, since it is larger than the sum of its proper divisors (4464087).

6603945 is a wasteful number, since it uses less digits than its factorization.

6603945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 6603945 is about 2569.8141956180. The cubic root of 6603945 is about 187.6151115375.

The spelling of 6603945 in words is "six million, six hundred three thousand, nine hundred forty-five".