1680240266 has 8 divisors (see below), whose sum is σ = 2530906560. Its totient is φ = 836604748.

The previous prime is 1680240259. The next prime is 1680240293. The reversal of 1680240266 is 6620420861.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1757096 + ... + 1758051.

It is an arithmetic number, because the mean of its divisors is an integer number (316363320).

Almost surely, 2^1680240266 is an apocalyptic number.

1680240266 is a deficient number, since it is larger than the sum of its proper divisors (850666294).

1680240266 is a wasteful number, since it uses less digits than its factorization.

1680240266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515388.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 1680240266 is about 40990.7339041398. The cubic root of 1680240266 is about 1188.8410593731.

The spelling of 1680240266 in words is "one billion, six hundred eighty million, two hundred forty thousand, two hundred sixty-six".