661259324 has 12 divisors (see below), whose sum is σ = 1262404248. Its totient is φ = 300572400.

The previous prime is 661259321. The next prime is 661259329. The reversal of 661259324 is 423952166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661259321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7514267 + ... + 7514354.

It is an arithmetic number, because the mean of its divisors is an integer number (105200354).

Almost surely, 2^661259324 is an apocalyptic number.

It is an amenable number.

661259324 is a deficient number, since it is larger than the sum of its proper divisors (601144924).

661259324 is a wasteful number, since it uses less digits than its factorization.

661259324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15028636 (or 15028634 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 661259324 is about 25714.9630371113. The cubic root of 661259324 is about 871.2121756128.

The spelling of 661259324 in words is "six hundred sixty-one million, two hundred fifty-nine thousand, three hundred twenty-four".