66156759726477 has 16 divisors (see below), whose sum is σ = 100812836067840. Its totient is φ = 37802911876272.

The previous prime is 66156759726457. The next prime is 66156759726487. The reversal of 66156759726477 is 77462795765166.

66156759726477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66156759726477 - 2⁶ = 66156759726413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66156759726457) 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, 38762443 + ... + 40433160.

It is an arithmetic number, because the mean of its divisors is an integer number (6300802254240).

Almost surely, 2^{66156759726477} is an apocalyptic number.

It is an amenable number.

66156759726477 is a deficient number, since it is larger than the sum of its proper divisors (34656076341363).

66156759726477 is a wasteful number, since it uses less digits than its factorization.

66156759726477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79235392.

The product of its digits is 5601052800, while the sum is 78.

The spelling of 66156759726477 in words is "sixty-six trillion, one hundred fifty-six billion, seven hundred fifty-nine million, seven hundred twenty-six thousand, four hundred seventy-seven".