65611603 has 4 divisors (see below), whose sum is σ = 67211928. Its totient is φ = 64011280.

The previous prime is 65611589. The next prime is 65611607. The reversal of 65611603 is 30611656.

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

It is a cyclic number.

It is not a de Polignac number, because 65611603 - 2²⁵ = 32057171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65611607) 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, 800101 + ... + 800182.

It is an arithmetic number, because the mean of its divisors is an integer number (16802982).

Almost surely, 2^65611603 is an apocalyptic number.

65611603 is a deficient number, since it is larger than the sum of its proper divisors (1600325).

65611603 is a wasteful number, since it uses less digits than its factorization.

65611603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600324.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 65611603 is about 8100.0989500129. The cubic root of 65611603 is about 403.3297118876.

The spelling of 65611603 in words is "sixty-five million, six hundred eleven thousand, six hundred three".