661313301 has 8 divisors (see below), whose sum is σ = 961910304. Its totient is φ = 400795920.

The previous prime is 661313293. The next prime is 661313329. The reversal of 661313301 is 103313166.

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

It is not a de Polignac number, because 661313301 - 2³ = 661313293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661313381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10019866 + ... + 10019931.

It is an arithmetic number, because the mean of its divisors is an integer number (120238788).

Almost surely, 2^661313301 is an apocalyptic number.

It is an amenable number.

661313301 is a deficient number, since it is larger than the sum of its proper divisors (300597003).

661313301 is a wasteful number, since it uses less digits than its factorization.

661313301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20039811.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 661313301 is about 25716.0125408276. The cubic root of 661313301 is about 871.2358799490.

Adding to 661313301 its reverse (103313166), we get a palindrome (764626467).

The spelling of 661313301 in words is "six hundred sixty-one million, three hundred thirteen thousand, three hundred one".