242650661 has 4 divisors (see below), whose sum is σ = 264709824. Its totient is φ = 220591500.

The previous prime is 242650649. The next prime is 242650679. The reversal of 242650661 is 166056242.

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 242650661 - 2¹⁰ = 242649637 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 (242650561) 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, 11029565 + ... + 11029586.

It is an arithmetic number, because the mean of its divisors is an integer number (66177456).

Almost surely, 2^242650661 is an apocalyptic number.

It is an amenable number.

242650661 is a deficient number, since it is larger than the sum of its proper divisors (22059163).

242650661 is a wasteful number, since it uses less digits than its factorization.

242650661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22059162.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 242650661 is about 15577.2481844516. The cubic root of 242650661 is about 623.7259687691.

The spelling of 242650661 in words is "two hundred forty-two million, six hundred fifty thousand, six hundred sixty-one".