825066066866 has 4 divisors (see below), whose sum is σ = 1237599100302. Its totient is φ = 412533033432.

The previous prime is 825066066829. The next prime is 825066066871. The reversal of 825066066866 is 668660660528.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 804391940641 + 20674126225 = 896879^2 + 143785^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206266516715 + ... + 206266516718.

Almost surely, 2^825066066866 is an apocalyptic number.

825066066866 is a deficient number, since it is larger than the sum of its proper divisors (412533033436).

825066066866 is a wasteful number, since it uses less digits than its factorization.

825066066866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412533033435.

The product of its (nonzero) digits is 29859840, while the sum is 59.

The spelling of 825066066866 in words is "eight hundred twenty-five billion, sixty-six million, sixty-six thousand, eight hundred sixty-six".