66386776409633 has 8 divisors (see below), whose sum is σ = 67577557443552. Its totient is φ = 65201875776576.

The previous prime is 66386776409627. The next prime is 66386776409677. The reversal of 66386776409633 is 33690467768366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66386776409633 - 2²⁰ = 66386775361057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66386776009633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1470077435 + ... + 1470122592.

It is an arithmetic number, because the mean of its divisors is an integer number (8447194680444).

Almost surely, 2^{66386776409633} is an apocalyptic number.

It is an amenable number.

66386776409633 is a deficient number, since it is larger than the sum of its proper divisors (1190781033919).

66386776409633 is a wasteful number, since it uses less digits than its factorization.

66386776409633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940200431.

The product of its (nonzero) digits is 2962842624, while the sum is 74.

The spelling of 66386776409633 in words is "sixty-six trillion, three hundred eighty-six billion, seven hundred seventy-six million, four hundred nine thousand, six hundred thirty-three".