66968201 has 4 divisors (see below), whose sum is σ = 67206804. Its totient is φ = 66729600.

The previous prime is 66968171. The next prime is 66968227. The reversal of 66968201 is 10286966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10286966 = 2 ⋅5143483.

It can be written as a sum of positive squares in 2 ways, for example, as 52345225 + 14622976 = 7235^2 + 3824^2 .

It is a cyclic number.

It is not a de Polignac number, because 66968201 - 2⁶ = 66968137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66968701) 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 3 ways as a sum of consecutive naturals, for example, 118880 + ... + 119441.

It is an arithmetic number, because the mean of its divisors is an integer number (16801701).

Almost surely, 2^66968201 is an apocalyptic number.

It is an amenable number.

66968201 is a deficient number, since it is larger than the sum of its proper divisors (238603).

66968201 is a wasteful number, since it uses less digits than its factorization.

66968201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238602.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 66968201 is about 8183.4101082617. The cubic root of 66968201 is about 406.0905445690.

The spelling of 66968201 in words is "sixty-six million, nine hundred sixty-eight thousand, two hundred one".