66694424 has 32 divisors (see below), whose sum is σ = 129435600. Its totient is φ = 32192640.

The previous prime is 66694421. The next prime is 66694429. The reversal of 66694424 is 42449666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66694421) 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, 40334 + ... + 41954.

Almost surely, 2^66694424 is an apocalyptic number.

It is an amenable number.

66694424 is a deficient number, since it is larger than the sum of its proper divisors (62741176).

66694424 is a wasteful number, since it uses less digits than its factorization.

66694424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803 (or 1799 counting only the distinct ones).

The product of its digits is 248832, while the sum is 41.

The square root of 66694424 is about 8166.6654149659. The cubic root of 66694424 is about 405.5364004658.

The spelling of 66694424 in words is "sixty-six million, six hundred ninety-four thousand, four hundred twenty-four".