66541062401 has 16 divisors (see below), whose sum is σ = 77331421440. Its totient is φ = 56617618320.

The previous prime is 66541062377. The next prime is 66541062421. The reversal of 66541062401 is 10426014566.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66541062401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66541062421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1900595 + ... + 1935288.

It is an arithmetic number, because the mean of its divisors is an integer number (4833213840).

Almost surely, 2^66541062401 is an apocalyptic number.

It is an amenable number.

66541062401 is a deficient number, since it is larger than the sum of its proper divisors (10790359039).

66541062401 is a wasteful number, since it uses less digits than its factorization.

66541062401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835996.

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 66541062401 its reverse (10426014566), we get a palindrome (76967076967).

The spelling of 66541062401 in words is "sixty-six billion, five hundred forty-one million, sixty-two thousand, four hundred one".