65603573 has 4 divisors (see below), whose sum is σ = 74975520. Its totient is φ = 56231628.

The previous prime is 65603569. The next prime is 65603617. The reversal of 65603573 is 37530656.

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 not a de Polignac number, because 65603573 - 2² = 65603569 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65603513) 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, 4685963 + ... + 4685976.

It is an arithmetic number, because the mean of its divisors is an integer number (18743880).

Almost surely, 2^65603573 is an apocalyptic number.

It is an amenable number.

65603573 is a deficient number, since it is larger than the sum of its proper divisors (9371947).

65603573 is an equidigital number, since it uses as much as digits as its factorization.

65603573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9371946.

The product of its (nonzero) digits is 56700, while the sum is 35.

The square root of 65603573 is about 8099.6032618888. The cubic root of 65603573 is about 403.3132571267.

The spelling of 65603573 in words is "sixty-five million, six hundred three thousand, five hundred seventy-three".