66948806 has 4 divisors (see below), whose sum is σ = 100423212. Its totient is φ = 33474402.

The previous prime is 66948793. The next prime is 66948841. The reversal of 66948806 is 60884966.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16737200 + ... + 16737203.

It is an arithmetic number, because the mean of its divisors is an integer number (25105803).

Almost surely, 2^66948806 is an apocalyptic number.

66948806 is a deficient number, since it is larger than the sum of its proper divisors (33474406).

66948806 is a wasteful number, since it uses less digits than its factorization.

66948806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33474405.

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 66948806 is about 8182.2250030172. The cubic root of 66948806 is about 406.0513374703.

The spelling of 66948806 in words is "sixty-six million, nine hundred forty-eight thousand, eight hundred six".