240550661 has 4 divisors (see below), whose sum is σ = 259054572. Its totient is φ = 222046752.

The previous prime is 240550577. The next prime is 240550733. The reversal of 240550661 is 166055042.

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

It can be written as a sum of positive squares in 2 ways, for example, as 133841761 + 106708900 = 11569^2 + 10330^2 .

It is a cyclic number.

It is not a de Polignac number, because 240550661 - 2¹⁰ = 240549637 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 (240556661) 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, 9251936 + ... + 9251961.

It is an arithmetic number, because the mean of its divisors is an integer number (64763643).

Almost surely, 2^240550661 is an apocalyptic number.

It is an amenable number.

240550661 is a deficient number, since it is larger than the sum of its proper divisors (18503911).

240550661 is a wasteful number, since it uses less digits than its factorization.

240550661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18503910.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 240550661 is about 15509.6957094586. The cubic root of 240550661 is about 621.9214247506.

The spelling of 240550661 in words is "two hundred forty million, five hundred fifty thousand, six hundred sixty-one".