661741301 has 6 divisors (see below), whose sum is σ = 716560290. Its totient is φ = 610837968.

The previous prime is 661741279. The next prime is 661741307. The reversal of 661741301 is 103147166.

It can be written as a sum of positive squares in 3 ways, for example, as 4844401 + 656896900 = 2201^2 + 25630^2 .

It is a de Polignac number, because none of the positive numbers 2^k-661741301 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661741307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1957646 + ... + 1957983.

It is an arithmetic number, because the mean of its divisors is an integer number (119426715).

Almost surely, 2^661741301 is an apocalyptic number.

It is an amenable number.

661741301 is a deficient number, since it is larger than the sum of its proper divisors (54818989).

661741301 is a wasteful number, since it uses less digits than its factorization.

661741301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3915655 (or 3915642 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 661741301 is about 25724.3328582103. The cubic root of 661741301 is about 871.4237931720.

Adding to 661741301 its reverse (103147166), we get a palindrome (764888467).

The spelling of 661741301 in words is "six hundred sixty-one million, seven hundred forty-one thousand, three hundred one".