1866666360 has 256 divisors, whose sum is σ = 6231375360. Its totient is φ = 444487680.

The previous prime is 1866666337. The next prime is 1866666377. The reversal of 1866666360 is 636666681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8846655 + ... + 8846865.

It is an arithmetic number, because the mean of its divisors is an integer number (24341310).

Almost surely, 2^1866666360 is an apocalyptic number.

1866666360 is a gapful number since it is divisible by the number (10) 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 1866666360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3115687680).

1866666360 is an abundant number, since it is smaller than the sum of its proper divisors (4364709000).

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

1866666360 is a wasteful number, since it uses less digits than its factorization.

1866666360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 48.

The square root of 1866666360 is about 43204.9344404085. The cubic root of 1866666360 is about 1231.2764328715.

The spelling of 1866666360 in words is "one billion, eight hundred sixty-six million, six hundred sixty-six thousand, three hundred sixty".