66023201 has 4 divisors (see below), whose sum is σ = 66405012. Its totient is φ = 65641392.

The previous prime is 66023197. The next prime is 66023231. The reversal of 66023201 is 10232066.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42510400 + 23512801 = 6520^2 + 4849^2 .

It is a cyclic number.

It is not a de Polignac number, because 66023201 - 2² = 66023197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66023231) 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, 190646 + ... + 190991.

It is an arithmetic number, because the mean of its divisors is an integer number (16601253).

Almost surely, 2^66023201 is an apocalyptic number.

It is an amenable number.

66023201 is a deficient number, since it is larger than the sum of its proper divisors (381811).

66023201 is a wasteful number, since it uses less digits than its factorization.

66023201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381810.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 66023201 is about 8125.4662020096. The cubic root of 66023201 is about 404.1713504588.

Adding to 66023201 its reverse (10232066), we get a palindrome (76255267).

The spelling of 66023201 in words is "sixty-six million, twenty-three thousand, two hundred one".