1866208271968 has 24 divisors (see below), whose sum is σ = 3674602470168. Its totient is φ = 932975898624.

The previous prime is 1866208271951. The next prime is 1866208271987. The reversal of 1866208271968 is 8691728026681.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3770721 + ... + 4236832.

It is an arithmetic number, because the mean of its divisors is an integer number (153108436257).

Almost surely, 2^{1866208271968} is an apocalyptic number.

It is an amenable number.

1866208271968 is a deficient number, since it is larger than the sum of its proper divisors (1808394198200).

1866208271968 is an equidigital number, since it uses as much as digits as its factorization.

1866208271968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8014846 (or 8014838 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 64.

The spelling of 1866208271968 in words is "one trillion, eight hundred sixty-six billion, two hundred eight million, two hundred seventy-one thousand, nine hundred sixty-eight".