66634 has 4 divisors (see below), whose sum is σ = 99954. Its totient is φ = 33316.

The previous prime is 66629. The next prime is 66643. The reversal of 66634 is 43666.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 61009 + 5625 = 247^2 + 75^2 .

It is a plaindrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 66599 and 66608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16657 + ... + 16660.

2⁶⁶⁶³⁴ is an apocalyptic number.

66634 is a deficient number, since it is larger than the sum of its proper divisors (33320).

66634 is a wasteful number, since it uses less digits than its factorization.

66634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33319.

The product of its digits is 2592, while the sum is 25.

The square root of 66634 is about 258.1356232681. The cubic root of 66634 is about 40.5413893796.

The spelling of 66634 in words is "sixty-six thousand, six hundred thirty-four".