66244001 has 4 divisors (see below), whose sum is σ = 66261012. Its totient is φ = 66226992.

The previous prime is 66243973. The next prime is 66244067. The reversal of 66244001 is 10044266.

It is a happy number.

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 24512401 + 41731600 = 4951^2 + 6460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66244001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66244081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551 + ... + 11523.

It is an arithmetic number, because the mean of its divisors is an integer number (16565253).

Almost surely, 2^66244001 is an apocalyptic number.

It is an amenable number.

66244001 is a deficient number, since it is larger than the sum of its proper divisors (17011).

66244001 is a wasteful number, since it uses less digits than its factorization.

66244001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17010.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 66244001 is about 8139.0417740665. The cubic root of 66244001 is about 404.6214030411.

Adding to 66244001 its reverse (10044266), we get a palindrome (76288267).

The spelling of 66244001 in words is "sixty-six million, two hundred forty-four thousand, one".