66748386 has 8 divisors (see below), whose sum is σ = 133496784. Its totient is φ = 22249460.

The previous prime is 66748379. The next prime is 66748399. The reversal of 66748386 is 68384766.

It is a happy number.

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

66748386 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5562360 + ... + 5562371.

It is an arithmetic number, because the mean of its divisors is an integer number (16687098).

Almost surely, 2^66748386 is an apocalyptic number.

66748386 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66748386 is a wasteful number, since it uses less digits than its factorization.

66748386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11124736.

The product of its digits is 1161216, while the sum is 48.

The square root of 66748386 is about 8169.9685433911. The cubic root of 66748386 is about 405.6457432196.

The spelling of 66748386 in words is "sixty-six million, seven hundred forty-eight thousand, three hundred eighty-six".