766765121 has 16 divisors (see below), whose sum is σ = 839942400. Its totient is φ = 697446288.

The previous prime is 766765117. The next prime is 766765163. The reversal of 766765121 is 121567667.

766765121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 766765121 - 2² = 766765117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766795121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40250 + ... + 56156.

It is an arithmetic number, because the mean of its divisors is an integer number (52496400).

Almost surely, 2^766765121 is an apocalyptic number.

It is an amenable number.

766765121 is a deficient number, since it is larger than the sum of its proper divisors (73177279).

766765121 is a wasteful number, since it uses less digits than its factorization.

766765121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16028.

The product of its digits is 105840, while the sum is 41.

The square root of 766765121 is about 27690.5240289887. The cubic root of 766765121 is about 915.2803031060.

The spelling of 766765121 in words is "seven hundred sixty-six million, seven hundred sixty-five thousand, one hundred twenty-one".