766706777 has 4 divisors (see below), whose sum is σ = 777505536. Its totient is φ = 755908020.

The previous prime is 766706761. The next prime is 766706779. The reversal of 766706777 is 777607667.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 766706777 - 2⁴ = 766706761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766706779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5399273 + ... + 5399414.

It is an arithmetic number, because the mean of its divisors is an integer number (194376384).

Almost surely, 2^766706777 is an apocalyptic number.

It is an amenable number.

766706777 is a deficient number, since it is larger than the sum of its proper divisors (10798759).

766706777 is a wasteful number, since it uses less digits than its factorization.

766706777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10798758.

The product of its (nonzero) digits is 3630312, while the sum is 53.

The square root of 766706777 is about 27689.4705077580. The cubic root of 766706777 is about 915.2570876227.

The spelling of 766706777 in words is "seven hundred sixty-six million, seven hundred six thousand, seven hundred seventy-seven".