68667765 has 16 divisors (see below), whose sum is σ = 114645888. Its totient is φ = 35030336.

The previous prime is 68667763. The next prime is 68667769. The reversal of 68667765 is 56776686.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 68667765 - 2¹ = 68667763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68667763) 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, 99174 + ... + 99863.

It is an arithmetic number, because the mean of its divisors is an integer number (7165368).

Almost surely, 2^68667765 is an apocalyptic number.

It is an amenable number.

68667765 is a deficient number, since it is larger than the sum of its proper divisors (45978123).

68667765 is a wasteful number, since it uses less digits than its factorization.

68667765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199068.

The product of its digits is 2540160, while the sum is 51.

The square root of 68667765 is about 8286.6015350082. The cubic root of 68667765 is about 409.4972322294.

The spelling of 68667765 in words is "sixty-eight million, six hundred sixty-seven thousand, seven hundred sixty-five".