6603422561 has 4 divisors (see below), whose sum is σ = 6816436224. Its totient is φ = 6390408900.

The previous prime is 6603422519. The next prime is 6603422599. The reversal of 6603422561 is 1652243066.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6603422561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6603422461) 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, 106506785 + ... + 106506846.

It is an arithmetic number, because the mean of its divisors is an integer number (1704109056).

Almost surely, 2^6603422561 is an apocalyptic number.

It is an amenable number.

6603422561 is a deficient number, since it is larger than the sum of its proper divisors (213013663).

6603422561 is a wasteful number, since it uses less digits than its factorization.

6603422561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213013662.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 6603422561 is about 81261.4457230488. The cubic root of 6603422561 is about 1876.1016398795.

The spelling of 6603422561 in words is "six billion, six hundred three million, four hundred twenty-two thousand, five hundred sixty-one".