66437 has 4 divisors (see below), whose sum is σ = 75936. Its totient is φ = 56940.

The previous prime is 66431. The next prime is 66449. The reversal of 66437 is 73466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66437 - 2⁶ = 66373 is a prime.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4739 + ... + 4752.

It is an arithmetic number, because the mean of its divisors is an integer number (18984).

2⁶⁶⁴³⁷ is an apocalyptic number.

It is an amenable number.

66437 is a deficient number, since it is larger than the sum of its proper divisors (9499).

66437 is an equidigital number, since it uses as much as digits as its factorization.

66437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9498.

The product of its digits is 3024, while the sum is 26.

The square root of 66437 is about 257.7537584595. The cubic root of 66437 is about 40.5013970965.

The spelling of 66437 in words is "sixty-six thousand, four hundred thirty-seven".