66846539647755 has 96 divisors (see below), whose sum is σ = 133330268298240. Its totient is φ = 30348697524480.

The previous prime is 66846539647739. The next prime is 66846539647819. The reversal of 66846539647755 is 55774693564866.

66846539647755 is a `hidden beast` number, since 6 + 6 + 8 + 4 + 6 + 5 + 3 + 96 + 477 + 55 = 666.

It is not a de Polignac number, because 66846539647755 - 2⁴ = 66846539647739 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 49413520 + ... + 50748290.

It is an arithmetic number, because the mean of its divisors is an integer number (1388856961440).

Almost surely, 2^{66846539647755} is an apocalyptic number.

66846539647755 is a deficient number, since it is larger than the sum of its proper divisors (66483728650485).

66846539647755 is a wasteful number, since it uses less digits than its factorization.

66846539647755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335881 (or 1335878 counting only the distinct ones).

The product of its digits is 27433728000, while the sum is 81.

The spelling of 66846539647755 in words is "sixty-six trillion, eight hundred forty-six billion, five hundred thirty-nine million, six hundred forty-seven thousand, seven hundred fifty-five".