1666554032 has 80 divisors (see below), whose sum is σ = 3847253760. Its totient is φ = 689337600.

The previous prime is 1666554023. The next prime is 1666554067. The reversal of 1666554032 is 2304556661.

It is a happy 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, 157319 + ... + 167577.

It is an arithmetic number, because the mean of its divisors is an integer number (48090672).

Almost surely, 2^1666554032 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 1666554032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1923626880).

1666554032 is an abundant number, since it is smaller than the sum of its proper divisors (2180699728).

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

1666554032 is a wasteful number, since it uses less digits than its factorization.

1666554032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10362 (or 10356 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 1666554032 is about 40823.4495357754. The cubic root of 1666554032 is about 1185.6043922622.

The spelling of 1666554032 in words is "one billion, six hundred sixty-six million, five hundred fifty-four thousand, thirty-two".