65116665506 has 4 divisors (see below), whose sum is σ = 97674998262. Its totient is φ = 32558332752.

The previous prime is 65116665491. The next prime is 65116665517. The reversal of 65116665506 is 60556661156.

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., 45025020481 + 20091645025 = 212191^2 + 141745^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16279166375 + ... + 16279166378.

Almost surely, 2^65116665506 is an apocalyptic number.

65116665506 is a deficient number, since it is larger than the sum of its proper divisors (32558332756).

65116665506 is a wasteful number, since it uses less digits than its factorization.

65116665506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32558332755.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 65116665506 in words is "sixty-five billion, one hundred sixteen million, six hundred sixty-five thousand, five hundred six".