66694337 has 8 divisors (see below), whose sum is σ = 67540200. Its totient is φ = 65854080.

The previous prime is 66694321. The next prime is 66694339. The reversal of 66694337 is 73349666.

It can be written as a sum of positive squares in 4 ways, for example, as 92416 + 66601921 = 304^2 + 8161^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 66694337 - 2⁴ = 66694321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66694339) 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, 25733 + ... + 28205.

It is an arithmetic number, because the mean of its divisors is an integer number (8442525).

Almost surely, 2^66694337 is an apocalyptic number.

It is an amenable number.

66694337 is a deficient number, since it is larger than the sum of its proper divisors (845863).

66694337 is a wasteful number, since it uses less digits than its factorization.

66694337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803.

The product of its digits is 489888, while the sum is 44.

The square root of 66694337 is about 8166.6600884327. The cubic root of 66694337 is about 405.5362241309.

The spelling of 66694337 in words is "sixty-six million, six hundred ninety-four thousand, three hundred thirty-seven".