661274241 has 8 divisors (see below), whose sum is σ = 881977920. Its totient is φ = 440710032.

The previous prime is 661274227. The next prime is 661274267. The reversal of 661274241 is 142472166.

661274241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 661274241 - 2¹¹ = 661272193 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (661274641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23250 + ... + 43163.

It is an arithmetic number, because the mean of its divisors is an integer number (110247240).

Almost surely, 2^661274241 is an apocalyptic number.

It is an amenable number.

661274241 is a deficient number, since it is larger than the sum of its proper divisors (220703679).

661274241 is a wasteful number, since it uses less digits than its factorization.

661274241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69735.

The product of its digits is 16128, while the sum is 33.

The square root of 661274241 is about 25715.2530806135. The cubic root of 661274241 is about 871.2187266354.

The spelling of 661274241 in words is "six hundred sixty-one million, two hundred seventy-four thousand, two hundred forty-one".