1666027328 has 56 divisors (see below), whose sum is σ = 3788980992. Its totient is φ = 711995904.

The previous prime is 1666027313. The next prime is 1666027339. The reversal of 1666027328 is 8237206661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159350 + ... + 169482.

Almost surely, 2^1666027328 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 1666027328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1894490496).

1666027328 is an abundant number, since it is smaller than the sum of its proper divisors (2122953664).

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

1666027328 is a wasteful number, since it uses less digits than its factorization.

1666027328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10519 (or 10509 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 1666027328 is about 40816.9980277825. The cubic root of 1666027328 is about 1185.4794781458.

The spelling of 1666027328 in words is "one billion, six hundred sixty-six million, twenty-seven thousand, three hundred twenty-eight".