65728478166 has 16 divisors (see below), whose sum is σ = 141569030064. Its totient is φ = 20224147104.

The previous prime is 65728478147. The next prime is 65728478219. The reversal of 65728478166 is 66187482756.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421336321 + ... + 421336476.

It is an arithmetic number, because the mean of its divisors is an integer number (8848064379).

Almost surely, 2^65728478166 is an apocalyptic number.

65728478166 is an abundant number, since it is smaller than the sum of its proper divisors (75840551898).

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

65728478166 is a wasteful number, since it uses less digits than its factorization.

65728478166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842672815.

The product of its digits is 27095040, while the sum is 60.

The spelling of 65728478166 in words is "sixty-five billion, seven hundred twenty-eight million, four hundred seventy-eight thousand, one hundred sixty-six".