68770866564 has 135 divisors (see below), whose sum is σ = 191201143903. Its totient is φ = 21549998592.

The previous prime is 68770866533. The next prime is 68770866587. The reversal of 68770866564 is 46566807786.

The square root of 68770866564 is 262242.

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

68770866564 is a `hidden beast` number, since 6 + 8 + 7 + 7 + 0 + 8 + 66 + 564 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 35850392964 + 32920473600 = 189342^2 + 181440^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 80245624 + ... + 80246480.

Almost surely, 2^68770866564 is an apocalyptic number.

68770866564 is the 262242-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68770866564

68770866564 is an abundant number, since it is smaller than the sum of its proper divisors (122430277339).

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

68770866564 is an equidigital number, since it uses as much as digits as its factorization.

68770866564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764 (or 879 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 63.

The spelling of 68770866564 in words is "sixty-eight billion, seven hundred seventy million, eight hundred sixty-six thousand, five hundred sixty-four".