66663301 has 8 divisors (see below), whose sum is σ = 68158584. Its totient is φ = 65181120.

The previous prime is 66663283. The next prime is 66663353. The reversal of 66663301 is 10336666.

It can be written as a sum of positive squares in 4 ways, for example, as 7834401 + 58828900 = 2799^2 + 7670^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 66663301 - 2⁷ = 66663173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66663101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7395 + ... + 13711.

It is an arithmetic number, because the mean of its divisors is an integer number (8519823).

Almost surely, 2^66663301 is an apocalyptic number.

66663301 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

66663301 is a deficient number, since it is larger than the sum of its proper divisors (1495283).

66663301 is a wasteful number, since it uses less digits than its factorization.

66663301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6551.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 66663301 is about 8164.7597025265. The cubic root of 66663301 is about 405.4733093686.

Adding to 66663301 its reverse (10336666), we get a palindrome (76999967).

The spelling of 66663301 in words is "sixty-six million, six hundred sixty-three thousand, three hundred one".