77650768 has 60 divisors (see below), whose sum is σ = 166521460. Its totient is φ = 35076288.

The previous prime is 77650723. The next prime is 77650799. The reversal of 77650768 is 86705677.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 2862864 + 74787904 = 1692^2 + 8648^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1652121 + ... + 1652167.

Almost surely, 2^77650768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77650768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83260730).

77650768 is an abundant number, since it is smaller than the sum of its proper divisors (88870692).

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

77650768 is an equidigital number, since it uses as much as digits as its factorization.

77650768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 46.

The square root of 77650768 is about 8811.9673172340. The cubic root of 77650768 is about 426.6272435363.

The spelling of 77650768 in words is "seventy-seven million, six hundred fifty thousand, seven hundred sixty-eight".