766043887 has 4 divisors (see below), whose sum is σ = 875478736. Its totient is φ = 656609040.

The previous prime is 766043849. The next prime is 766043951. The reversal of 766043887 is 788340667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788340667 = 20173 ⋅39079.

It is a cyclic number.

It is not a de Polignac number, because 766043887 - 2¹¹ = 766041839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 766043887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766046887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54717414 + ... + 54717427.

It is an arithmetic number, because the mean of its divisors is an integer number (218869684).

Almost surely, 2^766043887 is an apocalyptic number.

766043887 is a deficient number, since it is larger than the sum of its proper divisors (109434849).

766043887 is a wasteful number, since it uses less digits than its factorization.

766043887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109434848.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The square root of 766043887 is about 27677.4978457230. The cubic root of 766043887 is about 914.9932363361.

The spelling of 766043887 in words is "seven hundred sixty-six million, forty-three thousand, eight hundred eighty-seven".