2851666801 has 3 divisors (see below), whose sum is σ = 2851720203. Its totient is φ = 2851613400.

The previous prime is 2851666793. The next prime is 2851666841. The reversal of 2851666801 is 1086661582.

The square root of 2851666801 is 53401.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 512977201 + 2338689600 = 22649^2 + 48360^2 .

It is not a de Polignac number, because 2851666801 - 2³ = 2851666793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2851666841) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 26701 + ... + 80101.

It is an arithmetic number, because the mean of its divisors is an integer number (950573401).

Almost surely, 2^2851666801 is an apocalyptic number.

2851666801 is the 53401-st square number.

2851666801 is the 26701-st centered octagonal number.

It is an amenable number.

2851666801 is a deficient number, since it is larger than the sum of its proper divisors (53402).

2851666801 is an frugal number, since it uses more digits than its factorization.

2851666801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106802 (or 53401 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The cubic root of 2851666801 is about 1418.0762816853.

The spelling of 2851666801 in words is "two billion, eight hundred fifty-one million, six hundred sixty-six thousand, eight hundred one".