660147659489 has 4 divisors (see below), whose sum is σ = 669445513920. Its totient is φ = 650849805060.

The previous prime is 660147659477. The next prime is 660147659557. The reversal of 660147659489 is 984956741066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660147659489 is a prime.

It is a super-2 number, since 2×660147659489² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660147659449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4648927109 + ... + 4648927250.

It is an arithmetic number, because the mean of its divisors is an integer number (167361378480).

Almost surely, 2^660147659489 is an apocalyptic number.

It is an amenable number.

660147659489 is a deficient number, since it is larger than the sum of its proper divisors (9297854431).

660147659489 is an equidigital number, since it uses as much as digits as its factorization.

660147659489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9297854430.

The product of its (nonzero) digits is 78382080, while the sum is 65.

The spelling of 660147659489 in words is "six hundred sixty billion, one hundred forty-seven million, six hundred fifty-nine thousand, four hundred eighty-nine".