66739394 has 8 divisors (see below), whose sum is σ = 100508688. Its totient is φ = 33236500.

The previous prime is 66739339. The next prime is 66739417. The reversal of 66739394 is 49393766.

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

It is a super-2 number, since 2×66739394² = 8908293422974472, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65972 + ... + 66975.

It is an arithmetic number, because the mean of its divisors is an integer number (12563586).

Almost surely, 2^66739394 is an apocalyptic number.

66739394 is a deficient number, since it is larger than the sum of its proper divisors (33769294).

66739394 is a wasteful number, since it uses less digits than its factorization.

66739394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133200.

The product of its digits is 734832, while the sum is 47.

The square root of 66739394 is about 8169.4182167398. The cubic root of 66739394 is about 405.6275268974.

The spelling of 66739394 in words is "sixty-six million, seven hundred thirty-nine thousand, three hundred ninety-four".