1666920600682 has 8 divisors (see below), whose sum is σ = 2507084336196. Its totient is φ = 831225821952.

The previous prime is 1666920600659. The next prime is 1666920600701. The reversal of 1666920600682 is 2860060296661.

It can be written as a sum of positive squares in 2 ways, for example, as 1539934565481 + 126986035201 = 1240941^2 + 356351^2 .

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, 1117238263 + ... + 1117239754.

Almost surely, 2^{1666920600682} is an apocalyptic number.

1666920600682 is a deficient number, since it is larger than the sum of its proper divisors (840163735514).

1666920600682 is a wasteful number, since it uses less digits than its factorization.

1666920600682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234478392.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 1666920600682 in words is "one trillion, six hundred sixty-six billion, nine hundred twenty million, six hundred thousand, six hundred eighty-two".