660336403 has 4 divisors (see below), whose sum is σ = 660478968. Its totient is φ = 660193840.

The previous prime is 660336379. The next prime is 660336427. The reversal of 660336403 is 304633066.

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 (660336379) and next prime (660336427).

It is a cyclic number.

It is not a de Polignac number, because 660336403 - 2⁹ = 660335891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660336433) 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, 64093 + ... + 73678.

It is an arithmetic number, because the mean of its divisors is an integer number (165119742).

Almost surely, 2^660336403 is an apocalyptic number.

660336403 is a deficient number, since it is larger than the sum of its proper divisors (142565).

660336403 is a wasteful number, since it uses less digits than its factorization.

660336403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142564.

The product of its (nonzero) digits is 23328, while the sum is 31.

The square root of 660336403 is about 25697.0115577668. The cubic root of 660336403 is about 870.8066693565.

Adding to 660336403 its reverse (304633066), we get a palindrome (964969469).

The spelling of 660336403 in words is "six hundred sixty million, three hundred thirty-six thousand, four hundred three".