766741664 has 24 divisors (see below), whose sum is σ = 1625640660. Its totient is φ = 353880576.

The previous prime is 766741649. The next prime is 766741687. The reversal of 766741664 is 466147667.

It can be written as a sum of positive squares in 2 ways, for example, as 736579600 + 30162064 = 27140^2 + 5492^2 .

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, 921149 + ... + 921980.

Almost surely, 2^766741664 is an apocalyptic number.

It is an amenable number.

766741664 is an abundant number, since it is smaller than the sum of its proper divisors (858898996).

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

766741664 is a wasteful number, since it uses less digits than its factorization.

766741664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843152 (or 1843144 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 47.

The square root of 766741664 is about 27690.1004693013. The cubic root of 766741664 is about 915.2709695442.

The spelling of 766741664 in words is "seven hundred sixty-six million, seven hundred forty-one thousand, six hundred sixty-four".