77816744066 has 8 divisors (see below), whose sum is σ = 116985084300. Its totient is φ = 38821715968.

The previous prime is 77816744059. The next prime is 77816744141. The reversal of 77816744066 is 66044761877.

It can be written as a sum of positive squares in 2 ways, for example, as 69061212025 + 8755532041 = 262795^2 + 93571^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43326911 + ... + 43328706.

Almost surely, 2^77816744066 is an apocalyptic number.

77816744066 is a deficient number, since it is larger than the sum of its proper divisors (39168340234).

77816744066 is a wasteful number, since it uses less digits than its factorization.

77816744066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86656068.

The product of its (nonzero) digits is 9483264, while the sum is 56.

The spelling of 77816744066 in words is "seventy-seven billion, eight hundred sixteen million, seven hundred forty-four thousand, sixty-six".