664445011302734 has 4 divisors (see below), whose sum is σ = 996667516954104. Its totient is φ = 332222505651366.

The previous prime is 664445011302733. The next prime is 664445011302797. The reversal of 664445011302734 is 437203110544466.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664445011302733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166111252825682 + ... + 166111252825685.

It is an arithmetic number, because the mean of its divisors is an integer number (249166879238526).

Almost surely, 2^{664445011302734} is an apocalyptic number.

664445011302734 is a deficient number, since it is larger than the sum of its proper divisors (332222505651370).

664445011302734 is a wasteful number, since it uses less digits than its factorization.

664445011302734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332222505651369.

The product of its (nonzero) digits is 5806080, while the sum is 50.

The spelling of 664445011302734 in words is "six hundred sixty-four trillion, four hundred forty-five billion, eleven million, three hundred two thousand, seven hundred thirty-four".