1866640104827 has 2 divisors, whose sum is σ = 1866640104828. Its totient is φ = 1866640104826.

The previous prime is 1866640104793. The next prime is 1866640104841. The reversal of 1866640104827 is 7284010466681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1866640104827 - 2¹⁶ = 1866640039291 is a prime.

It is not a weakly prime, because it can be changed into another prime (1866640124827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 933320052413 + 933320052414.

It is an arithmetic number, because the mean of its divisors is an integer number (933320052414).

Almost surely, 2^{1866640104827} is an apocalyptic number.

1866640104827 is a deficient number, since it is larger than the sum of its proper divisors (1).

1866640104827 is an equidigital number, since it uses as much as digits as its factorization.

1866640104827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3096576, while the sum is 53.

The spelling of 1866640104827 in words is "one trillion, eight hundred sixty-six billion, six hundred forty million, one hundred four thousand, eight hundred twenty-seven".