766253640 has 32 divisors (see below), whose sum is σ = 2298761280. Its totient is φ = 204334272.

The previous prime is 766253623. The next prime is 766253647. The reversal of 766253640 is 46352667.

It is not an unprimeable number, because it can be changed into a prime (766253647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3192604 + ... + 3192843.

It is an arithmetic number, because the mean of its divisors is an integer number (71836290).

Almost surely, 2^766253640 is an apocalyptic number.

It is an amenable number.

766253640 is an abundant number, since it is smaller than the sum of its proper divisors (1532507640).

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

766253640 is a wasteful number, since it uses less digits than its factorization.

766253640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6385461 (or 6385457 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 39.

The square root of 766253640 is about 27681.2868197994. The cubic root of 766253640 is about 915.0767411523.

The spelling of 766253640 in words is "seven hundred sixty-six million, two hundred fifty-three thousand, six hundred forty".