663155 has 4 divisors (see below), whose sum is σ = 795792. Its totient is φ = 530520.

The previous prime is 663149. The next prime is 663161. The reversal of 663155 is 551366.

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 (663149) and next prime (663161).

It is not a de Polignac number, because 663155 - 2⁸ = 662899 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66311 + ... + 66320.

It is an arithmetic number, because the mean of its divisors is an integer number (198948).

2⁶⁶³¹⁵⁵ is an apocalyptic number.

663155 is a deficient number, since it is larger than the sum of its proper divisors (132637).

663155 is a wasteful number, since it uses less digits than its factorization.

663155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132636.

The product of its digits is 2700, while the sum is 26.

The square root of 663155 is about 814.3432937036. The cubic root of 663155 is about 87.2043901922.

It can be divided in two parts, 663 and 155, that added together give a palindrome (818).

The spelling of 663155 in words is "six hundred sixty-three thousand, one hundred fifty-five".