766706740 has 12 divisors (see below), whose sum is σ = 1610084196. Its totient is φ = 306682688.

The previous prime is 766706737. The next prime is 766706761. The reversal of 766706740 is 47607667.

It can be written as a sum of positive squares in 2 ways, for example, as 378380304 + 388326436 = 19452^2 + 19706^2 .

It is a super-2 number, since 2×766706740² = 1175678450322855200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 19167649 + ... + 19167688.

It is an arithmetic number, because the mean of its divisors is an integer number (134173683).

Almost surely, 2^766706740 is an apocalyptic number.

It is an amenable number.

766706740 is an abundant number, since it is smaller than the sum of its proper divisors (843377456).

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

766706740 is a wasteful number, since it uses less digits than its factorization.

766706740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38335346 (or 38335344 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 43.

The square root of 766706740 is about 27689.4698396340. The cubic root of 766706740 is about 915.2570728998.

The spelling of 766706740 in words is "seven hundred sixty-six million, seven hundred six thousand, seven hundred forty".