13764036066021 has 6 divisors (see below), whose sum is σ = 19881385428710. Its totient is φ = 9176024044008.

The previous prime is 13764036066013. The next prime is 13764036066073. The reversal of 13764036066021 is 12066063046731.

13764036066021 is a `hidden beast` number, since 1 + 3 + 7 + 6 + 4 + 0 + 36 + 0 + 6 + 602 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8123149812996 + 5640886253025 = 2850114^2 + 2375055^2 .

It is not a de Polignac number, because 13764036066021 - 2³ = 13764036066013 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 (13764034066021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 764668670326 + ... + 764668670343.

Almost surely, 2^{13764036066021} is an apocalyptic number.

It is an amenable number.

13764036066021 is a deficient number, since it is larger than the sum of its proper divisors (6117349362689).

13764036066021 is a wasteful number, since it uses less digits than its factorization.

13764036066021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529337340675 (or 1529337340672 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The spelling of 13764036066021 in words is "thirteen trillion, seven hundred sixty-four billion, thirty-six million, sixty-six thousand, twenty-one".