660602923 has 4 divisors (see below), whose sum is σ = 667143648. Its totient is φ = 654062200.

The previous prime is 660602911. The next prime is 660602927. The reversal of 660602923 is 329206066.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660602923 is a prime.

It is a super-2 number, since 2×660602923² = 872792443752287858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660602927) 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, 3270211 + ... + 3270412.

It is an arithmetic number, because the mean of its divisors is an integer number (166785912).

Almost surely, 2^660602923 is an apocalyptic number.

660602923 is a deficient number, since it is larger than the sum of its proper divisors (6540725).

660602923 is a wasteful number, since it uses less digits than its factorization.

660602923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6540724.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 660602923 is about 25702.1968516312. The cubic root of 660602923 is about 870.9238097388.

Adding to 660602923 its reverse (329206066), we get a palindrome (989808989).

The spelling of 660602923 in words is "six hundred sixty million, six hundred two thousand, nine hundred twenty-three".