663741 has 32 divisors (see below), whose sum is σ = 1111040. Its totient is φ = 388800.

The previous prime is 663737. The next prime is 663763. The reversal of 663741 is 147366.

It is not a de Polignac number, because 663741 - 2² = 663737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (3024) is a multiple of the sum of its prime divisors (108).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10851 + ... + 10911.

It is an arithmetic number, because the mean of its divisors is an integer number (34720).

2⁶⁶³⁷⁴¹ is an apocalyptic number.

663741 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

663741 is a deficient number, since it is larger than the sum of its proper divisors (447299).

663741 is a wasteful number, since it uses less digits than its factorization.

663741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 108 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 663741 is about 814.7030133736. The cubic root of 663741 is about 87.2300688184.

The spelling of 663741 in words is "six hundred sixty-three thousand, seven hundred forty-one".