1666277344 has 24 divisors (see below), whose sum is σ = 3289959288. Its totient is φ = 830732160.

The previous prime is 1666277317. The next prime is 1666277359. The reversal of 1666277344 is 4437726661.

It is a junction number, because it is equal to n+sod(n) for n = 1666277294 and 1666277303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63927 + ... + 86134.

It is an arithmetic number, because the mean of its divisors is an integer number (137081637).

Almost surely, 2^1666277344 is an apocalyptic number.

It is an amenable number.

1666277344 is a deficient number, since it is larger than the sum of its proper divisors (1623681944).

1666277344 is a wasteful number, since it uses less digits than its factorization.

1666277344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150418 (or 150410 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 46.

The square root of 1666277344 is about 40820.0605585048. The cubic root of 1666277344 is about 1185.5387756950.

The spelling of 1666277344 in words is "one billion, six hundred sixty-six million, two hundred seventy-seven thousand, three hundred forty-four".