65166768078 has 16 divisors (see below), whose sum is σ = 130352327040. Its totient is φ = 21719124216.

The previous prime is 65166768071. The next prime is 65166768091. The reversal of 65166768078 is 87086766156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65166768071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 737668 + ... + 821271.

It is an arithmetic number, because the mean of its divisors is an integer number (8147020440).

Almost surely, 2^65166768078 is an apocalyptic number.

65166768078 is an abundant number, since it is smaller than the sum of its proper divisors (65185558962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65166768078 is a wasteful number, since it uses less digits than its factorization.

65166768078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565911.

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

The spelling of 65166768078 in words is "sixty-five billion, one hundred sixty-six million, seven hundred sixty-eight thousand, seventy-eight".