664065175673602 has 4 divisors (see below), whose sum is σ = 996097763510406. Its totient is φ = 332032587836800.

The previous prime is 664065175673561. The next prime is 664065175673629. The reversal of 664065175673602 is 206376571560466.

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., 477223642011601 + 186841533662001 = 21845449^2 + 13668999^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166016293918399 + ... + 166016293918402.

Almost surely, 2^{664065175673602} is an apocalyptic number.

664065175673602 is a deficient number, since it is larger than the sum of its proper divisors (332032587836804).

664065175673602 is a wasteful number, since it uses less digits than its factorization.

664065175673602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332032587836803.

The product of its (nonzero) digits is 228614400, while the sum is 64.

The spelling of 664065175673602 in words is "six hundred sixty-four trillion, sixty-five billion, one hundred seventy-five million, six hundred seventy-three thousand, six hundred two".