66320378 has 8 divisors (see below), whose sum is σ = 100361268. Its totient is φ = 32866624.

The previous prime is 66320369. The next prime is 66320399. The reversal of 66320378 is 87302366.

It can be written as a sum of positive squares in 2 ways, for example, as 41049649 + 25270729 = 6407^2 + 5027^2 .

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

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, 146501 + ... + 146952.

Almost surely, 2^66320378 is an apocalyptic number.

66320378 is a deficient number, since it is larger than the sum of its proper divisors (34040890).

66320378 is a wasteful number, since it uses less digits than its factorization.

66320378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293568.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 66320378 is about 8143.7324366656. The cubic root of 66320378 is about 404.7768480577.

The spelling of 66320378 in words is "sixty-six million, three hundred twenty thousand, three hundred seventy-eight".