66694 has 4 divisors (see below), whose sum is σ = 100044. Its totient is φ = 33346.

The previous prime is 66683. The next prime is 66697. The reversal of 66694 is 49666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66697) by changing a digit.

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, 16672 + ... + 16675.

It is an arithmetic number, because the mean of its divisors is an integer number (25011).

2⁶⁶⁶⁹⁴ is an apocalyptic number.

66694 is a deficient number, since it is larger than the sum of its proper divisors (33350).

66694 is a wasteful number, since it uses less digits than its factorization.

66694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33349.

The product of its digits is 7776, while the sum is 31.

The square root of 66694 is about 258.2518150953. The cubic root of 66694 is about 40.5535541085.

The spelling of 66694 in words is "sixty-six thousand, six hundred ninety-four".