67776765 has 16 divisors (see below), whose sum is σ = 123934848. Its totient is φ = 30983616.

The previous prime is 67776749. The next prime is 67776767. The reversal of 67776765 is 56767776.

It is a happy number.

It is not a de Polignac number, because 67776765 - 2⁴ = 67776749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67776767) 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, 322642 + ... + 322851.

It is an arithmetic number, because the mean of its divisors is an integer number (7745928).

Almost surely, 2^67776765 is an apocalyptic number.

It is an amenable number.

67776765 is a deficient number, since it is larger than the sum of its proper divisors (56158083).

67776765 is a wasteful number, since it uses less digits than its factorization.

67776765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645508.

The product of its digits is 2593080, while the sum is 51.

The square root of 67776765 is about 8232.6645139955. The cubic root of 67776765 is about 407.7183694168.

The spelling of 67776765 in words is "sixty-seven million, seven hundred seventy-six thousand, seven hundred sixty-five".