66773401013 has 16 divisors (see below), whose sum is σ = 78460800000. Its totient is φ = 56170784880.

The previous prime is 66773400977. The next prime is 66773401063. The reversal of 66773401013 is 31010437766.

66773401013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66773401013 - 2²⁴ = 66756623797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66773401063) 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, 3706013 + ... + 3723986.

It is an arithmetic number, because the mean of its divisors is an integer number (4903800000).

Almost surely, 2^66773401013 is an apocalyptic number.

It is an amenable number.

66773401013 is a deficient number, since it is larger than the sum of its proper divisors (11687398987).

66773401013 is a wasteful number, since it uses less digits than its factorization.

66773401013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7430072.

The product of its (nonzero) digits is 63504, while the sum is 38.

Adding to 66773401013 its reverse (31010437766), we get a palindrome (97783838779).

The spelling of 66773401013 in words is "sixty-six billion, seven hundred seventy-three million, four hundred one thousand, thirteen".