1666270584 has 96 divisors (see below), whose sum is σ = 5081955840. Its totient is φ = 488635200.

The previous prime is 1666270579. The next prime is 1666270591. The reversal of 1666270584 is 4850726661.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9382 + ... + 58485.

It is an arithmetic number, because the mean of its divisors is an integer number (52937040).

Almost surely, 2^1666270584 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666270584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2540977920).

1666270584 is an abundant number, since it is smaller than the sum of its proper divisors (3415685256).

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

1666270584 is a wasteful number, since it uses less digits than its factorization.

1666270584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67921 (or 67914 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 1666270584 is about 40819.9777559959. The cubic root of 1666270584 is about 1185.5371724699.

The spelling of 1666270584 in words is "one billion, six hundred sixty-six million, two hundred seventy thousand, five hundred eighty-four".