660244728043 has 4 divisors (see below), whose sum is σ = 699082653240. Its totient is φ = 621406802848.

The previous prime is 660244728019. The next prime is 660244728067. The reversal of 660244728043 is 340827442066.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (660244728019) and next prime (660244728067).

It is not a de Polignac number, because 660244728043 - 2¹⁷ = 660244596971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660244727984 and 660244728002.

It is not an unprimeable number, because it can be changed into a prime (660244728943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19418962573 + ... + 19418962606.

It is an arithmetic number, because the mean of its divisors is an integer number (174770663310).

Almost surely, 2^660244728043 is an apocalyptic number.

660244728043 is a deficient number, since it is larger than the sum of its proper divisors (38837925197).

660244728043 is a wasteful number, since it uses less digits than its factorization.

660244728043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38837925196.

The product of its (nonzero) digits is 1548288, while the sum is 46.

The spelling of 660244728043 in words is "six hundred sixty billion, two hundred forty-four million, seven hundred twenty-eight thousand, forty-three".