660723 has 16 divisors (see below), whose sum is σ = 1022976. Its totient is φ = 371520.

The previous prime is 660719. The next prime is 660727. The reversal of 660723 is 327066.

660723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (660719) and next prime (660727).

It is not a de Polignac number, because 660723 - 2² = 660719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660693 and 660702.

It is not an unprimeable number, because it can be changed into a prime (660727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1318 + ... + 1748.

It is an arithmetic number, because the mean of its divisors is an integer number (63936).

2⁶⁶⁰⁷²³ is an apocalyptic number.

660723 is a deficient number, since it is larger than the sum of its proper divisors (362253).

660723 is a wasteful number, since it uses less digits than its factorization.

660723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 660723 is about 812.8486944075. The cubic root of 660723 is about 87.0976575467.

Adding to 660723 its reverse (327066), we get a palindrome (987789).

The spelling of 660723 in words is "six hundred sixty thousand, seven hundred twenty-three".