661362103123 has 8 divisors (see below), whose sum is σ = 691907630400. Its totient is φ = 631502992320.

The previous prime is 661362103093. The next prime is 661362103133. The reversal of 661362103123 is 321301263166.

661362103123 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-661362103123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661362103133) 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, 171602148 + ... + 171606001.

It is an arithmetic number, because the mean of its divisors is an integer number (86488453800).

Almost surely, 2^661362103123 is an apocalyptic number.

661362103123 is a deficient number, since it is larger than the sum of its proper divisors (30545527277).

661362103123 is a wasteful number, since it uses less digits than its factorization.

661362103123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343208237.

The product of its (nonzero) digits is 23328, while the sum is 34.

Adding to 661362103123 its reverse (321301263166), we get a palindrome (982663366289).

The spelling of 661362103123 in words is "six hundred sixty-one billion, three hundred sixty-two million, one hundred three thousand, one hundred twenty-three".