661460340473 has 8 divisors (see below), whose sum is σ = 668932719840. Its totient is φ = 653988855520.

The previous prime is 661460340469. The next prime is 661460340521. The reversal of 661460340473 is 374043064166.

661460340473 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 not a de Polignac number, because 661460340473 - 2² = 661460340469 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (661460340973) 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, 1323986 + ... + 1753812.

It is an arithmetic number, because the mean of its divisors is an integer number (83616589980).

Almost surely, 2^661460340473 is an apocalyptic number.

It is an amenable number.

661460340473 is a deficient number, since it is larger than the sum of its proper divisors (7472379367).

661460340473 is a wasteful number, since it uses less digits than its factorization.

661460340473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447207.

The product of its (nonzero) digits is 870912, while the sum is 44.

The spelling of 661460340473 in words is "six hundred sixty-one billion, four hundred sixty million, three hundred forty thousand, four hundred seventy-three".