66763806 has 8 divisors (see below), whose sum is σ = 133527624. Its totient is φ = 22254600.

The previous prime is 66763793. The next prime is 66763817. The reversal of 66763806 is 60836766.

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

66763806 is an admirable number.

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 in 3 ways as a sum of consecutive naturals, for example, 5563645 + ... + 5563656.

It is an arithmetic number, because the mean of its divisors is an integer number (16690953).

Almost surely, 2^66763806 is an apocalyptic number.

66763806 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.

66763806 is a wasteful number, since it uses less digits than its factorization.

66763806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11127306.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 66763806 is about 8170.9121889787. The cubic root of 66763806 is about 405.6769778113.

The spelling of 66763806 in words is "sixty-six million, seven hundred sixty-three thousand, eight hundred six".