766220650 has 36 divisors (see below), whose sum is σ = 1543248882. Its totient is φ = 282909120.

The previous prime is 766220647. The next prime is 766220717. The reversal of 766220650 is 56022667.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 156575169 + 609645481 = 12513^2 + 24691^2 .

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 17 ways as a sum of consecutive naturals, for example, 36889 + ... + 53788.

Almost surely, 2^766220650 is an apocalyptic number.

766220650 is an abundant number, since it is smaller than the sum of its proper divisors (777028232).

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

766220650 is a wasteful number, since it uses less digits than its factorization.

766220650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90715 (or 90697 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 766220650 is about 27680.6909234578. The cubic root of 766220650 is about 915.0636085056.

The spelling of 766220650 in words is "seven hundred sixty-six million, two hundred twenty thousand, six hundred fifty".