66383255398464 has 105 divisors (see below), whose sum is σ = 196782503950461. Its totient is φ = 22127556257280.

The previous prime is 66383255398457. The next prime is 66383255398519. The reversal of 66383255398464 is 46489355238366.

The square root of 66383255398464 is 8147592.

It is a perfect power (a square), and thus also a powerful number.

66383255398464 is a `hidden beast` number, since 6 + 6 + 3 + 8 + 3 + 2 + 5 + 539 + 84 + 6 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 58204570572864 + 8178684825600 = 7629192^2 + 2859840^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 66383255398392 and 66383255398401.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 586570044 + ... + 586683204.

Almost surely, 2^{66383255398464} is an apocalyptic number.

66383255398464 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

66383255398464 is the 8147592-nd square number.

It is an amenable number.

66383255398464 is an abundant number, since it is smaller than the sum of its proper divisors (130399248551997).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66383255398464 is an frugal number, since it uses more digits than its factorization.

66383255398464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226346 (or 113166 counting only the distinct ones).

The product of its digits is 2687385600, while the sum is 72.

The spelling of 66383255398464 in words is "sixty-six trillion, three hundred eighty-three billion, two hundred fifty-five million, three hundred ninety-eight thousand, four hundred sixty-four".