75661304356 has 27 divisors (see below), whose sum is σ = 145550224603. Its totient is φ = 34388751320.

The previous prime is 75661304353. The next prime is 75661304377. The reversal of 75661304356 is 65340316657.

The square root of 75661304356 is 275066.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75661304353) by changing a digit.

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 in 8 ways as a sum of consecutive naturals, for example, 6045201 + ... + 6057703.

Almost surely, 2^75661304356 is an apocalyptic number.

75661304356 is the 275066-th square number.

It is an amenable number.

75661304356 is a deficient number, since it is larger than the sum of its proper divisors (69888920247).

75661304356 is an equidigital number, since it uses as much as digits as its factorization.

75661304356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25032 (or 12516 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 46.

The spelling of 75661304356 in words is "seventy-five billion, six hundred sixty-one million, three hundred four thousand, three hundred fifty-six".