66768801 has 8 divisors (see below), whose sum is σ = 97118304. Its totient is φ = 40465920.

The previous prime is 66768797. The next prime is 66768851. The reversal of 66768801 is 10886766.

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

It is not a de Polignac number, because 66768801 - 2² = 66768797 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66768851) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1011616 + ... + 1011681.

It is an arithmetic number, because the mean of its divisors is an integer number (12139788).

Almost surely, 2^66768801 is an apocalyptic number.

It is an amenable number.

66768801 is a deficient number, since it is larger than the sum of its proper divisors (30349503).

66768801 is a wasteful number, since it uses less digits than its factorization.

66768801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023311.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 66768801 is about 8171.2178406894. The cubic root of 66768801 is about 405.6870946001.

It can be divided in two parts, 66 and 768801, that added together give a palindrome (768867).

The spelling of 66768801 in words is "sixty-six million, seven hundred sixty-eight thousand, eight hundred one".