660265043491 has 8 divisors (see below), whose sum is σ = 676583039664. Its totient is φ = 643957236480.

The previous prime is 660265043441. The next prime is 660265043507. The reversal of 660265043491 is 194340562066.

660265043491 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 660265043491 - 2¹⁹ = 660264519203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660265043441) 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, 2416006 + ... + 2675371.

It is an arithmetic number, because the mean of its divisors is an integer number (84572879958).

Almost surely, 2^660265043491 is an apocalyptic number.

660265043491 is a deficient number, since it is larger than the sum of its proper divisors (16317996173).

660265043491 is a wasteful number, since it uses less digits than its factorization.

660265043491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5094581.

The product of its (nonzero) digits is 933120, while the sum is 46.

The spelling of 660265043491 in words is "six hundred sixty billion, two hundred sixty-five million, forty-three thousand, four hundred ninety-one".