1666650716 has 24 divisors (see below), whose sum is σ = 2930605440. Its totient is φ = 829345392.

The previous prime is 1666650659. The next prime is 1666650719. The reversal of 1666650716 is 6170566661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666650719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1141595 + ... + 1143053.

It is an arithmetic number, because the mean of its divisors is an integer number (122108560).

Almost surely, 2^1666650716 is an apocalyptic number.

It is an amenable number.

1666650716 is a deficient number, since it is larger than the sum of its proper divisors (1263954724).

1666650716 is a wasteful number, since it uses less digits than its factorization.

1666650716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2633 (or 2631 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 1666650716 is about 40824.6336909469. The cubic root of 1666650716 is about 1185.6273191633.

The spelling of 1666650716 in words is "one billion, six hundred sixty-six million, six hundred fifty thousand, seven hundred sixteen".