766681056 has 72 divisors (see below), whose sum is σ = 2230988760. Its totient is φ = 249613056.

The previous prime is 766681021. The next prime is 766681063. The reversal of 766681056 is 650186667.

It is a tau number, because it is divible by the number of its divisors (72).

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 11 ways as a sum of consecutive naturals, for example, 18571 + ... + 43338.

It is an arithmetic number, because the mean of its divisors is an integer number (30985955).

Almost surely, 2^766681056 is an apocalyptic number.

It is an amenable number.

766681056 is an abundant number, since it is smaller than the sum of its proper divisors (1464307704).

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

766681056 is a wasteful number, since it uses less digits than its factorization.

766681056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61968 (or 61957 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 766681056 is about 27689.0060493330. The cubic root of 766681056 is about 915.2468526839.

The spelling of 766681056 in words is "seven hundred sixty-six million, six hundred eighty-one thousand, fifty-six".