675811840221 has 12 divisors (see below), whose sum is σ = 1115625895072. Its totient is φ = 386178194376.

The previous prime is 675811840217. The next prime is 675811840261. The reversal of 675811840221 is 122048118576.

675811840221 is a `hidden beast` number, since 6 + 7 + 581 + 1 + 8 + 40 + 2 + 21 = 666.

675811840221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 675811840221 - 2² = 675811840217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (675811840261) 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, 5363585971 + ... + 5363586096.

Almost surely, 2^675811840221 is an apocalyptic number.

It is an amenable number.

675811840221 is a deficient number, since it is larger than the sum of its proper divisors (439814054851).

675811840221 is a wasteful number, since it uses less digits than its factorization.

675811840221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10727172080 (or 10727172077 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

Adding to 675811840221 its reverse (122048118576), we get a palindrome (797859958797).

The spelling of 675811840221 in words is "six hundred seventy-five billion, eight hundred eleven million, eight hundred forty thousand, two hundred twenty-one".