537665 has 8 divisors (see below), whose sum is σ = 649728. Its totient is φ = 427120.

The previous prime is 537661. The next prime is 537673. The reversal of 537665 is 566735.

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

It is not a de Polignac number, because 537665 - 2² = 537661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (537661) 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, 674 + ... + 1236.

It is an arithmetic number, because the mean of its divisors is an integer number (81216).

2⁵³⁷⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

537665 is a deficient number, since it is larger than the sum of its proper divisors (112063).

537665 is a wasteful number, since it uses less digits than its factorization.

537665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759.

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

The square root of 537665 is about 733.2564353621. The cubic root of 537665 is about 81.3149854847.

The spelling of 537665 in words is "five hundred thirty-seven thousand, six hundred sixty-five".