66034401 has 4 divisors (see below), whose sum is σ = 88045872. Its totient is φ = 44022932.

The previous prime is 66034333. The next prime is 66034417. The reversal of 66034401 is 10443066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66034401 - 2⁹ = 66033889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66034471) 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, 11005731 + ... + 11005736.

It is an arithmetic number, because the mean of its divisors is an integer number (22011468).

Almost surely, 2^66034401 is an apocalyptic number.

It is an amenable number.

66034401 is a deficient number, since it is larger than the sum of its proper divisors (22011471).

66034401 is a wasteful number, since it uses less digits than its factorization.

66034401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22011470.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 66034401 is about 8126.1553640082. The cubic root of 66034401 is about 404.1942033505.

Adding to 66034401 its reverse (10443066), we get a palindrome (76477467).

The spelling of 66034401 in words is "sixty-six million, thirty-four thousand, four hundred one".