65166768087 has 16 divisors (see below), whose sum is σ = 88705601280. Its totient is φ = 42541955072.

The previous prime is 65166768071. The next prime is 65166768091. The reversal of 65166768087 is 78086766156.

It is a cyclic number.

It is not a de Polignac number, because 65166768087 - 2⁴ = 65166768071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65166768087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65166768187) 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, 670803 + ... + 761780.

It is an arithmetic number, because the mean of its divisors is an integer number (5544100080).

Almost surely, 2^65166768087 is an apocalyptic number.

65166768087 is a deficient number, since it is larger than the sum of its proper divisors (23538833193).

65166768087 is a wasteful number, since it uses less digits than its factorization.

65166768087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432902.

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 65166768087 in words is "sixty-five billion, one hundred sixty-six million, seven hundred sixty-eight thousand, eighty-seven".