1866868685 has 32 divisors (see below), whose sum is σ = 2599257600. Its totient is φ = 1272130560.

The previous prime is 1866868673. The next prime is 1866868687. The reversal of 1866868685 is 5868686681.

It is not a de Polignac number, because 1866868685 - 2⁸ = 1866868429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866868687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209756 + ... + 218474.

It is an arithmetic number, because the mean of its divisors is an integer number (81226800).

Almost surely, 2^1866868685 is an apocalyptic number.

It is an amenable number.

1866868685 is a deficient number, since it is larger than the sum of its proper divisors (732388915).

1866868685 is a wasteful number, since it uses less digits than its factorization.

1866868685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8981.

The product of its digits is 26542080, while the sum is 62.

The square root of 1866868685 is about 43207.2758340537. The cubic root of 1866868685 is about 1231.3209166296.

The spelling of 1866868685 in words is "one billion, eight hundred sixty-six million, eight hundred sixty-eight thousand, six hundred eighty-five".