1666258412 has 48 divisors (see below), whose sum is σ = 3649739520. Its totient is φ = 647998272.

The previous prime is 1666258403. The next prime is 1666258457. The reversal of 1666258412 is 2148526661.

It is a self number, because there is not a number n which added to its sum of digits gives 1666258412.

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, 17318 + ... + 60269.

It is an arithmetic number, because the mean of its divisors is an integer number (76036240).

Almost surely, 2^1666258412 is an apocalyptic number.

It is an amenable number.

1666258412 is an abundant number, since it is smaller than the sum of its proper divisors (1983481108).

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

1666258412 is a wasteful number, since it uses less digits than its factorization.

1666258412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77670 (or 77668 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 1666258412 is about 40819.8286620608. The cubic root of 1666258412 is about 1185.5342857051.

The spelling of 1666258412 in words is "one billion, six hundred sixty-six million, two hundred fifty-eight thousand, four hundred twelve".