766315640 has 16 divisors (see below), whose sum is σ = 1724210280. Its totient is φ = 306526240.

The previous prime is 766315631. The next prime is 766315651. The reversal of 766315640 is 46513667.

It is a happy number.

766315640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 766315594 and 766315603.

It is a congruent 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, 9578906 + ... + 9578985.

Almost surely, 2^766315640 is an apocalyptic number.

It is an amenable number.

766315640 is an abundant number, since it is smaller than the sum of its proper divisors (957894640).

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

766315640 is a wasteful number, since it uses less digits than its factorization.

766315640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19157902 (or 19157898 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 766315640 is about 27682.4066872806. The cubic root of 766315640 is about 915.1014210689.

The spelling of 766315640 in words is "seven hundred sixty-six million, three hundred fifteen thousand, six hundred forty".