663145 has 8 divisors (see below), whose sum is σ = 909504. Its totient is φ = 454704.

The previous prime is 663127. The next prime is 663149. The reversal of 663145 is 541366.

663145 = 253² + 254² + ... + 262².

663145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 663145 - 2¹¹ = 661097 is a prime.

It is a super-2 number, since 2×663145² = 879522582050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9439 + ... + 9508.

It is an arithmetic number, because the mean of its divisors is an integer number (113688).

2⁶⁶³¹⁴⁵ is an apocalyptic number.

It is an amenable number.

663145 is a deficient number, since it is larger than the sum of its proper divisors (246359).

663145 is a wasteful number, since it uses less digits than its factorization.

663145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18959.

The product of its digits is 2160, while the sum is 25.

The square root of 663145 is about 814.3371537637. The cubic root of 663145 is about 87.2039518592.

It can be divided in two parts, 663 and 145, that added together give a palindrome (808).

The spelling of 663145 in words is "six hundred sixty-three thousand, one hundred forty-five".