663877 has 4 divisors (see below), whose sum is σ = 679360. Its totient is φ = 648396.

The previous prime is 663869. The next prime is 663881. The reversal of 663877 is 778366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 663877 - 2³ = 663869 is a prime.

It is a super-3 number, since 3×663877³ = 877776850533321399, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an Ulam number.

It is a Duffinian number.

663877 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7677 + ... + 7762.

It is an arithmetic number, because the mean of its divisors is an integer number (169840).

2⁶⁶³⁸⁷⁷ is an apocalyptic number.

It is an amenable number.

663877 is a deficient number, since it is larger than the sum of its proper divisors (15483).

663877 is a wasteful number, since it uses less digits than its factorization.

663877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15482.

The product of its digits is 42336, while the sum is 37.

The square root of 663877 is about 814.7864750964. The cubic root of 663877 is about 87.2360262019.

It can be divided in two parts, 663 and 877, that added together give a triangular number (1540 = T₅₅).

The spelling of 663877 in words is "six hundred sixty-three thousand, eight hundred seventy-seven".