77681800706 has 8 divisors (see below), whose sum is σ = 119364718284. Its totient is φ = 37893561280.

The previous prime is 77681800667. The next prime is 77681800727. The reversal of 77681800706 is 60700818677.

It can be written as a sum of positive squares in 2 ways, for example, as 48710697025 + 28971103681 = 220705^2 + 170209^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473669435 + ... + 473669598.

Almost surely, 2^77681800706 is an apocalyptic number.

77681800706 is a deficient number, since it is larger than the sum of its proper divisors (41682917578).

77681800706 is a wasteful number, since it uses less digits than its factorization.

77681800706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947339076.

The product of its (nonzero) digits is 790272, while the sum is 50.

The spelling of 77681800706 in words is "seventy-seven billion, six hundred eighty-one million, eight hundred thousand, seven hundred six".