66387478363 has 2 divisors, whose sum is σ = 66387478364. Its totient is φ = 66387478362.

The previous prime is 66387478319. The next prime is 66387478373. The reversal of 66387478363 is 36387478366.

66387478363 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66387478363 - 2¹⁷ = 66387347291 is a prime.

It is not a weakly prime, because it can be changed into another prime (66387478373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33193739181 + 33193739182.

It is an arithmetic number, because the mean of its divisors is an integer number (33193739182).

Almost surely, 2^66387478363 is an apocalyptic number.

66387478363 is a deficient number, since it is larger than the sum of its proper divisors (1).

66387478363 is an equidigital number, since it uses as much as digits as its factorization.

66387478363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73156608, while the sum is 61.

The spelling of 66387478363 in words is "sixty-six billion, three hundred eighty-seven million, four hundred seventy-eight thousand, three hundred sixty-three".