664175020441 has 4 divisors (see below), whose sum is σ = 664179822900. Its totient is φ = 664170217984.

The previous prime is 664175020417. The next prime is 664175020471. The reversal of 664175020441 is 144020571466.

664175020441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 475555056025 + 188619964416 = 689605^2 + 434304^2 .

It is a cyclic number.

It is not a de Polignac number, because 664175020441 - 2³³ = 655585085849 is a prime.

It is a super-2 number, since 2×664175020441² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664175020394 and 664175020403.

It is not an unprimeable number, because it can be changed into a prime (664175020471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2187436 + ... + 2472493.

It is an arithmetic number, because the mean of its divisors is an integer number (166044955725).

Almost surely, 2^664175020441 is an apocalyptic number.

It is an amenable number.

664175020441 is a deficient number, since it is larger than the sum of its proper divisors (4802459).

664175020441 is a wasteful number, since it uses less digits than its factorization.

664175020441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4802458.

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 664175020441 in words is "six hundred sixty-four billion, one hundred seventy-five million, twenty thousand, four hundred forty-one".