1866666704 has 80 divisors (see below), whose sum is σ = 4360435200. Its totient is φ = 756231552.

The previous prime is 1866666689. The next prime is 1866666727. The reversal of 1866666704 is 4076666681.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1571999 + ... + 1573185.

It is an arithmetic number, because the mean of its divisors is an integer number (54505440).

Almost surely, 2^1866666704 is an apocalyptic number.

1866666704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1866666704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2180217600).

1866666704 is an abundant number, since it is smaller than the sum of its proper divisors (2493768496).

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

1866666704 is a wasteful number, since it uses less digits than its factorization.

1866666704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960 (or 1954 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The square root of 1866666704 is about 43204.9384214351. The cubic root of 1866666704 is about 1231.2765085071.

The spelling of 1866666704 in words is "one billion, eight hundred sixty-six million, six hundred sixty-six thousand, seven hundred four".