660613603 has 8 divisors (see below), whose sum is σ = 748874000. Its totient is φ = 577702368.

The previous prime is 660613559. The next prime is 660613609. The reversal of 660613603 is 306316066.

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 660613603 - 2¹³ = 660605411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660613609) 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, 1337028 + ... + 1337521.

It is an arithmetic number, because the mean of its divisors is an integer number (93609250).

Almost surely, 2^660613603 is an apocalyptic number.

660613603 is a deficient number, since it is larger than the sum of its proper divisors (88260397).

660613603 is a wasteful number, since it uses less digits than its factorization.

660613603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2674581.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 660613603 is about 25702.4046151328. The cubic root of 660613603 is about 870.9285031362.

Adding to 660613603 its reverse (306316066), we get a palindrome (966929669).

The spelling of 660613603 in words is "six hundred sixty million, six hundred thirteen thousand, six hundred three".