1666461006 has 128 divisors (see below), whose sum is σ = 4717440000. Its totient is φ = 424507392.

The previous prime is 1666460977. The next prime is 1666461029. The reversal of 1666461006 is 6001646661.

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, 115270 + ... + 128918.

It is an arithmetic number, because the mean of its divisors is an integer number (36855000).

Almost surely, 2^1666461006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666461006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2358720000).

1666461006 is an abundant number, since it is smaller than the sum of its proper divisors (3050978994).

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

1666461006 is a wasteful number, since it uses less digits than its factorization.

1666461006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13703 (or 13697 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1666461006 is about 40822.3101502108. The cubic root of 1666461006 is about 1185.5823319541.

The spelling of 1666461006 in words is "one billion, six hundred sixty-six million, four hundred sixty-one thousand, six".