75664399346658 has 24 divisors (see below), whose sum is σ = 163966616167068. Its totient is φ = 25217299641312.

The previous prime is 75664399346587. The next prime is 75664399346663. The reversal of 75664399346658 is 85664399346657.

75664399346658 is a `hidden beast` number, since 7 + 5 + 6 + 6 + 439 + 93 + 46 + 6 + 58 = 666.

75664399346658 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 71333784240489 + 4330615106169 = 8445933^2 + 2081013^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 347121985 + ... + 347339892.

Almost surely, 2^{75664399346658} is an apocalyptic number.

75664399346658 is an abundant number, since it is smaller than the sum of its proper divisors (88302216820410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75664399346658 is a wasteful number, since it uses less digits than its factorization.

75664399346658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694467938 (or 694467935 counting only the distinct ones).

The product of its digits is 21163161600, while the sum is 81.

Subtracting 75664399346658 from its reverse (85664399346657), we obtain a palindrome (9999999999999).

The spelling of 75664399346658 in words is "seventy-five trillion, six hundred sixty-four billion, three hundred ninety-nine million, three hundred forty-six thousand, six hundred fifty-eight".