77069718 has 80 divisors (see below), whose sum is σ = 191751120. Its totient is φ = 22939200.

The previous prime is 77069683. The next prime is 77069731. The reversal of 77069718 is 81796077.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 108348 + ... + 109056.

It is an arithmetic number, because the mean of its divisors is an integer number (2396889).

Almost surely, 2^77069718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77069718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95875560).

77069718 is an abundant number, since it is smaller than the sum of its proper divisors (114681402).

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

77069718 is a wasteful number, since it uses less digits than its factorization.

77069718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795 (or 786 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 45.

The square root of 77069718 is about 8778.9360403183. The cubic root of 77069718 is about 425.5604472342.

It can be divided in two parts, 7706 and 9718, that added together give a square (17424 = 132²).

The spelling of 77069718 in words is "seventy-seven million, sixty-nine thousand, seven hundred eighteen".