770320061778 has 8 divisors (see below), whose sum is σ = 1540640123568. Its totient is φ = 256773353924.

The previous prime is 770320061723. The next prime is 770320061807. The reversal of 770320061778 is 877160023077.

It is a happy number.

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

770320061778 is an admirable number.

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, 64193338476 + ... + 64193338487.

It is an arithmetic number, because the mean of its divisors is an integer number (192580015446).

Almost surely, 2^770320061778 is an apocalyptic number.

770320061778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

770320061778 is a wasteful number, since it uses less digits than its factorization.

770320061778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128386676968.

The product of its (nonzero) digits is 691488, while the sum is 48.

The spelling of 770320061778 in words is "seven hundred seventy billion, three hundred twenty million, sixty-one thousand, seven hundred seventy-eight".