661362098260 has 24 divisors (see below), whose sum is σ = 1389263236200. Its totient is φ = 264468109824.

The previous prime is 661362098153. The next prime is 661362098261. The reversal of 661362098260 is 62890263166.

It can be written as a sum of positive squares in 4 ways, for example, as 1527559056 + 659834539204 = 39084^2 + 812302^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661362098261) 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, 4724889 + ... + 4862848.

It is an arithmetic number, because the mean of its divisors is an integer number (57885968175).

Almost surely, 2^661362098260 is an apocalyptic number.

It is an amenable number.

661362098260 is an abundant number, since it is smaller than the sum of its proper divisors (727901137940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661362098260 is a wasteful number, since it uses less digits than its factorization.

661362098260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9591195 (or 9591193 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 49.

The spelling of 661362098260 in words is "six hundred sixty-one billion, three hundred sixty-two million, ninety-eight thousand, two hundred sixty".