660073441 has 4 divisors (see below), whose sum is σ = 661176000. Its totient is φ = 658970884.

The previous prime is 660073429. The next prime is 660073459. The reversal of 660073441 is 144370066.

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, and also an emirpimes, since its reverse is a distinct semiprime: 144370066 = 2 ⋅72185033.

It is a cyclic number.

It is not a de Polignac number, because 660073441 - 2⁵ = 660073409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660073411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550381 + ... + 551578.

It is an arithmetic number, because the mean of its divisors is an integer number (165294000).

Almost surely, 2^660073441 is an apocalyptic number.

It is an amenable number.

660073441 is a deficient number, since it is larger than the sum of its proper divisors (1102559).

660073441 is a wasteful number, since it uses less digits than its factorization.

660073441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102558.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 660073441 is about 25691.8944610941. The cubic root of 660073441 is about 870.6910618846.

The spelling of 660073441 in words is "six hundred sixty million, seventy-three thousand, four hundred forty-one".