65566003 has 4 divisors (see below), whose sum is σ = 65596960. Its totient is φ = 65535048.

The previous prime is 65565977. The next prime is 65566009. The reversal of 65566003 is 30066556.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65566003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65566009) 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, 12048 + ... + 16621.

It is an arithmetic number, because the mean of its divisors is an integer number (16399240).

Almost surely, 2^65566003 is an apocalyptic number.

65566003 is a deficient number, since it is larger than the sum of its proper divisors (30957).

65566003 is a wasteful number, since it uses less digits than its factorization.

65566003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30956.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 65566003 is about 8097.2836803461. The cubic root of 65566003 is about 403.2362523142.

The spelling of 65566003 in words is "sixty-five million, five hundred sixty-six thousand, three".