66403762056478 has 32 divisors (see below), whose sum is σ = 125755603983360. Its totient is φ = 25544107049760.

The previous prime is 66403762056473. The next prime is 66403762056487. The reversal of 66403762056478 is 87465026730466.

It is a happy number.

66403762056478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66403762056473) 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 15 ways as a sum of consecutive naturals, for example, 2729059101 + ... + 2729083432.

It is an arithmetic number, because the mean of its divisors is an integer number (3929862624480).

Almost surely, 2^{66403762056478} is an apocalyptic number.

66403762056478 is a deficient number, since it is larger than the sum of its proper divisors (59351841926882).

66403762056478 is a wasteful number, since it uses less digits than its factorization.

66403762056478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5458142632.

The product of its (nonzero) digits is 243855360, while the sum is 64.

The spelling of 66403762056478 in words is "sixty-six trillion, four hundred three billion, seven hundred sixty-two million, fifty-six thousand, four hundred seventy-eight".