66344042201077 has 4 divisors (see below), whose sum is σ = 66344063823180. Its totient is φ = 66344020578976.

The previous prime is 66344042201069. The next prime is 66344042201081. The reversal of 66344042201077 is 77010224044366.

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 49293303604561 + 17050738596516 = 7020919^2 + 4129254^2 .

It is a cyclic number.

It is not a de Polignac number, because 66344042201077 - 2³ = 66344042201069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66344042201377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5257648 + ... + 12662185.

It is an arithmetic number, because the mean of its divisors is an integer number (16586015955795).

Almost surely, 2^{66344042201077} is an apocalyptic number.

It is an amenable number.

66344042201077 is a deficient number, since it is larger than the sum of its proper divisors (21622103).

66344042201077 is a wasteful number, since it uses less digits than its factorization.

66344042201077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21622102.

The product of its (nonzero) digits is 1354752, while the sum is 46.

The spelling of 66344042201077 in words is "sixty-six trillion, three hundred forty-four billion, forty-two million, two hundred one thousand, seventy-seven".