39841172066 has 4 divisors (see below), whose sum is σ = 59761758102. Its totient is φ = 19920586032.

The previous prime is 39841171963. The next prime is 39841172081. The reversal of 39841172066 is 66027114893.

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., 27812566441 + 12028605625 = 166771^2 + 109675^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 39841172066.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9960293015 + ... + 9960293018.

Almost surely, 2^39841172066 is an apocalyptic number.

39841172066 is a deficient number, since it is larger than the sum of its proper divisors (19920586036).

39841172066 is a wasteful number, since it uses less digits than its factorization.

39841172066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19920586035.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 39841172066 in words is "thirty-nine billion, eight hundred forty-one million, one hundred seventy-two thousand, sixty-six".