1666766850101 has 12 divisors (see below), whose sum is σ = 1735261442304. Its totient is φ = 1600866363600.

The previous prime is 1666766850097. The next prime is 1666766850131. The reversal of 1666766850101 is 1010586676661.

It is not a de Polignac number, because 1666766850101 - 2² = 1666766850097 is a prime.

It is a super-2 number, since 2×1666766850101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666766850131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5027555 + ... + 5348816.

It is an arithmetic number, because the mean of its divisors is an integer number (144605120192).

Almost surely, 2^{1666766850101} is an apocalyptic number.

It is an amenable number.

1666766850101 is a deficient number, since it is larger than the sum of its proper divisors (68494592203).

1666766850101 is a wasteful number, since it uses less digits than its factorization.

1666766850101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10376620 (or 10376591 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 1666766850101 in words is "one trillion, six hundred sixty-six billion, seven hundred sixty-six million, eight hundred fifty thousand, one hundred one".