660463 has 4 divisors (see below), whose sum is σ = 662688. Its totient is φ = 658240.

The previous prime is 660449. The next prime is 660493. The reversal of 660463 is 364066.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 660463 - 2⁹ = 659951 is a prime.

It is a super-2 number, since 2×660463² = 872422748738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660403) 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, 583 + ... + 1288.

It is an arithmetic number, because the mean of its divisors is an integer number (165672).

2⁶⁶⁰⁴⁶³ is an apocalyptic number.

660463 is a deficient number, since it is larger than the sum of its proper divisors (2225).

660463 is a wasteful number, since it uses less digits than its factorization.

660463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 660463 is about 812.6887473074. The cubic root of 660463 is about 87.0862314967.

It can be divided in two parts, 66046 and 3, that added together give a square (66049 = 257²).

The spelling of 660463 in words is "six hundred sixty thousand, four hundred sixty-three".