503567661 has 4 divisors (see below), whose sum is σ = 671423552. Its totient is φ = 335711772.

The previous prime is 503567641. The next prime is 503567707. The reversal of 503567661 is 166765305.

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 not a de Polignac number, because 503567661 - 2¹¹ = 503565613 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 (503567611) 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, 83927941 + ... + 83927946.

It is an arithmetic number, because the mean of its divisors is an integer number (167855888).

Almost surely, 2^503567661 is an apocalyptic number.

It is an amenable number.

503567661 is a deficient number, since it is larger than the sum of its proper divisors (167855891).

503567661 is a wasteful number, since it uses less digits than its factorization.

503567661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167855890.

The product of its (nonzero) digits is 113400, while the sum is 39.

The square root of 503567661 is about 22440.3132999519. The cubic root of 503567661 is about 795.5838233585.

The spelling of 503567661 in words is "five hundred three million, five hundred sixty-seven thousand, six hundred sixty-one".