66368578419 has 32 divisors (see below), whose sum is σ = 115513305600. Its totient is φ = 37129272480.

The previous prime is 66368578417. The next prime is 66368578421. The reversal of 66368578419 is 91487586366.

It is an interprime number because it is at equal distance from previous prime (66368578417) and next prime (66368578421).

It is not a de Polignac number, because 66368578419 - 2¹ = 66368578417 is a prime.

It is a super-2 number, since 2×66368578419² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66368578417) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8590879 + ... + 8598600.

It is an arithmetic number, because the mean of its divisors is an integer number (3609790800).

Almost surely, 2^66368578419 is an apocalyptic number.

66368578419 is a deficient number, since it is larger than the sum of its proper divisors (49144727181).

66368578419 is a wasteful number, since it uses less digits than its factorization.

66368578419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17189512 (or 17189506 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 66368578419 in words is "sixty-six billion, three hundred sixty-eight million, five hundred seventy-eight thousand, four hundred nineteen".