1666530766 has 8 divisors (see below), whose sum is σ = 2500038864. Its totient is φ = 833184480.

The previous prime is 1666530763. The next prime is 1666530769. The reversal of 1666530766 is 6670356661.

It is an interprime number because it is at equal distance from previous prime (1666530763) and next prime (1666530769).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666530763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10170 + ... + 58621.

It is an arithmetic number, because the mean of its divisors is an integer number (312504858).

Almost surely, 2^1666530766 is an apocalyptic number.

1666530766 is a deficient number, since it is larger than the sum of its proper divisors (833508098).

1666530766 is a wasteful number, since it uses less digits than its factorization.

1666530766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80906.

The product of its (nonzero) digits is 816480, while the sum is 46.

The square root of 1666530766 is about 40823.1645760100. The cubic root of 1666530766 is about 1185.5988750093.

The spelling of 1666530766 in words is "one billion, six hundred sixty-six million, five hundred thirty thousand, seven hundred sixty-six".