664524624041 has 4 divisors (see below), whose sum is σ = 665717667012. Its totient is φ = 663331581072.

The previous prime is 664524624017. The next prime is 664524624079. The reversal of 664524624041 is 140426425466.

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 273943372816 + 390581251225 = 523396^2 + 624965^2 .

It is a cyclic number.

It is not a de Polignac number, because 664524624041 - 2³⁰ = 663450882217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664524623983 and 664524624001.

It is not an unprimeable number, because it can be changed into a prime (664524624091) 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, 596520650 + ... + 596521763.

It is an arithmetic number, because the mean of its divisors is an integer number (166429416753).

Almost surely, 2^664524624041 is an apocalyptic number.

It is an amenable number.

664524624041 is a deficient number, since it is larger than the sum of its proper divisors (1193042971).

664524624041 is a wasteful number, since it uses less digits than its factorization.

664524624041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193042970.

The product of its (nonzero) digits is 1105920, while the sum is 44.

The spelling of 664524624041 in words is "six hundred sixty-four billion, five hundred twenty-four million, six hundred twenty-four thousand, forty-one".