1894165875666 has 48 divisors (see below), whose sum is σ = 4367954727864. Its totient is φ = 591169093632.

The previous prime is 1894165875619. The next prime is 1894165875697. The reversal of 1894165875666 is 6665785614981.

It can be written as a sum of positive squares in 4 ways, for example, as 1877297321025 + 16868554641 = 1370145^2 + 129879^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1894165875594 and 1894165875603.

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 23 ways as a sum of consecutive naturals, for example, 15977431 + ... + 16095546.

Almost surely, 2^{1894165875666} is an apocalyptic number.

1894165875666 is an abundant number, since it is smaller than the sum of its proper divisors (2473788852198).

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

1894165875666 is a wasteful number, since it uses less digits than its factorization.

1894165875666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32073195 (or 32073192 counting only the distinct ones).

The product of its digits is 522547200, while the sum is 72.

The spelling of 1894165875666 in words is "one trillion, eight hundred ninety-four billion, one hundred sixty-five million, eight hundred seventy-five thousand, six hundred sixty-six".