665753 has 8 divisors (see below), whose sum is σ = 751680. Its totient is φ = 584080.

The previous prime is 665747. The next prime is 665761. The reversal of 665753 is 357566.

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 665753 - 2¹⁶ = 600217 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (665713) 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, 725 + ... + 1362.

It is an arithmetic number, because the mean of its divisors is an integer number (93960).

2⁶⁶⁵⁷⁵³ is an apocalyptic number.

It is an amenable number.

665753 is a deficient number, since it is larger than the sum of its proper divisors (85927).

665753 is a wasteful number, since it uses less digits than its factorization.

665753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127.

The product of its digits is 18900, while the sum is 32.

The square root of 665753 is about 815.9368848140. The cubic root of 665753 is about 87.3181201608.

The spelling of 665753 in words is "six hundred sixty-five thousand, seven hundred fifty-three".