1666366713 has 24 divisors (see below), whose sum is σ = 2627582880. Its totient is φ = 1009229760.

The previous prime is 1666366711. The next prime is 1666366727. The reversal of 1666366713 is 3176636661.

It is not a de Polignac number, because 1666366713 - 2¹ = 1666366711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1666366711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165693 + ... + 175461.

It is an arithmetic number, because the mean of its divisors is an integer number (109482620).

Almost surely, 2^1666366713 is an apocalyptic number.

It is an amenable number.

1666366713 is a deficient number, since it is larger than the sum of its proper divisors (961216167).

1666366713 is a wasteful number, since it uses less digits than its factorization.

1666366713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11509 (or 11506 counting only the distinct ones).

The product of its digits is 489888, while the sum is 45.

The square root of 1666366713 is about 40821.1552139329. The cubic root of 1666366713 is about 1185.5599703501.

The spelling of 1666366713 in words is "one billion, six hundred sixty-six million, three hundred sixty-six thousand, seven hundred thirteen".