766538747968 has 28 divisors (see below), whose sum is σ = 1738400375872. Its totient is φ = 328516606080.

The previous prime is 766538747957. The next prime is 766538747977. The reversal of 766538747968 is 869747835667.

It is a tau number, because it is divible by the number of its divisors (28).

It is a junction number, because it is equal to n+sod(n) for n = 766538747894 and 766538747903.

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, 855511548 + ... + 855512443.

Almost surely, 2^766538747968 is an apocalyptic number.

It is an amenable number.

766538747968 is an abundant number, since it is smaller than the sum of its proper divisors (971861627904).

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

766538747968 is a wasteful number, since it uses less digits than its factorization.

766538747968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711024010 (or 1711024000 counting only the distinct ones).

The product of its digits is 2560481280, while the sum is 76.

The spelling of 766538747968 in words is "seven hundred sixty-six billion, five hundred thirty-eight million, seven hundred forty-seven thousand, nine hundred sixty-eight".