766778916 has 24 divisors (see below), whose sum is σ = 1793294944. Its totient is φ = 255000960.

The previous prime is 766778891. The next prime is 766778917. The reversal of 766778916 is 619877667.

It is not an unprimeable number, because it can be changed into a prime (766778917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68590 + ... + 78981.

Almost surely, 2^766778916 is an apocalyptic number.

It is an amenable number.

766778916 is an abundant number, since it is smaller than the sum of its proper divisors (1026516028).

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

766778916 is a wasteful number, since it uses less digits than its factorization.

766778916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148011 (or 148009 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 57.

The square root of 766778916 is about 27690.7731203013. The cubic root of 766778916 is about 915.2857920603.

The spelling of 766778916 in words is "seven hundred sixty-six million, seven hundred seventy-eight thousand, nine hundred sixteen".