1666665016 has 16 divisors (see below), whose sum is σ = 3125458440. Its totient is φ = 833209440.

The previous prime is 1666664969. The next prime is 1666665029. The reversal of 1666665016 is 6105666661.

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, 70135 + ... + 90841.

Almost surely, 2^1666665016 is an apocalyptic number.

It is an amenable number.

1666665016 is a deficient number, since it is larger than the sum of its proper divisors (1458793424).

1666665016 is a wasteful number, since it uses less digits than its factorization.

1666665016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30774 (or 30770 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 1666665016 is about 40824.8088299260. The cubic root of 1666665016 is about 1185.6307100802.

The spelling of 1666665016 in words is "one billion, six hundred sixty-six million, six hundred sixty-five thousand, sixteen".