66287288926818 has 24 divisors (see below), whose sum is σ = 143907991089408. Its totient is φ = 22051835014392.

The previous prime is 66287288926799. The next prime is 66287288926921. The reversal of 66287288926818 is 81862988278266.

66287288926818 is a `hidden beast` number, since 6 + 62 + 8 + 7 + 288 + 9 + 268 + 18 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3660654130 + ... + 3660672237.

It is an arithmetic number, because the mean of its divisors is an integer number (5996166295392).

Almost surely, 2^{66287288926818} is an apocalyptic number.

66287288926818 is an abundant number, since it is smaller than the sum of its proper divisors (77620702162590).

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

66287288926818 is a wasteful number, since it uses less digits than its factorization.

66287288926818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7321326878 (or 7321326875 counting only the distinct ones).

The product of its digits is 3567255552, while the sum is 81.

The spelling of 66287288926818 in words is "sixty-six trillion, two hundred eighty-seven billion, two hundred eighty-eight million, nine hundred twenty-six thousand, eight hundred eighteen".