66949768301 has 4 divisors (see below), whose sum is σ = 72099750492. Its totient is φ = 61799786112.

The previous prime is 66949768297. The next prime is 66949768307. The reversal of 66949768301 is 10386794966.

It is a happy number.

66949768301 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10386794966 = 2 ⋅5193397483.

It can be written as a sum of positive squares in 2 ways, for example, as 45845233225 + 21104535076 = 214115^2 + 145274^2 .

It is a cyclic number.

It is not a de Polignac number, because 66949768301 - 2² = 66949768297 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 (66949768307) 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, 2574991076 + ... + 2574991101.

It is an arithmetic number, because the mean of its divisors is an integer number (18024937623).

Almost surely, 2^66949768301 is an apocalyptic number.

It is an amenable number.

66949768301 is a deficient number, since it is larger than the sum of its proper divisors (5149982191).

66949768301 is a wasteful number, since it uses less digits than its factorization.

66949768301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5149982190.

The product of its (nonzero) digits is 11757312, while the sum is 59.

The spelling of 66949768301 in words is "sixty-six billion, nine hundred forty-nine million, seven hundred sixty-eight thousand, three hundred one".